CHAPTER 11: "The Neighbourhood"
Singapore's most consequential diplomatic achievement is not UNCLOS but the creation and maintenance of ASEAN. The Association of Southeast Asian Nations was formed on August 8, 1967, with the signing of the ASEAN Declaration (the Bangkok Declaration) by five nations: Indonesia, Malaysia, Singapore, Thailand, and the Philippines. Singapore was the only one of these five nations that had sought the creation of such an organization. The other four had been more ambivalent, and Indonesia in particular—as the largest nation in Southeast Asia by population and territory—saw little reason to bind itself to an association of smaller states.
S. Rajaratnam was the intellectual architect of ASEAN, though the organizational credit belongs to Thailand's Foreign Minister, Thanat Koman, who chaired the initial negotiations. Rajaratnam's contribution was to articulate the underlying logic: five nations that had clashed or competed with one another could, if they committed to certain principles, create a framework for peaceful coexistence and gradual cooperation. The framework would be based on sovereign equality, mutual non-interference in internal affairs, peaceful settlement of disputes, and a commitment to cooperation on matters of mutual interest. These principles—which became known as the ASEAN Way—were not ideological commitments but pragmatic recognition that without such commitments, the region would continue to be characterized by conflict and instability.
In particular, Rajaratnam insisted that ASEAN be based on the absolute principle of sovereign equality. Indonesia's population was 120 million; Singapore's was less than two million. Indonesia's territory was vast; Singapore was a small island. Yet within ASEAN, each country would have an equal vote, and any major decision would require consensus. This principle was not obviously in Indonesia's interest—one might have expected Indonesia to dominate ASEAN or to decline to join it on terms of equality with much smaller neighbors. The fact that Indonesia accepted this principle was a remarkable achievement of Singaporean diplomacy, reflecting both the force of Rajaratnam's argument and the willingness of Indonesia's Foreign Minister, Adam Malik, to see beyond raw power calculations.
The ASEAN framework functioned adequately during the 1970s as a venue for dialogue and the coordination of positions on issues of mutual concern. But it faced its first serious test in the late 1970s with the Vietnamese invasion of Cambodia and the resulting conflict that would dominate regional politics and international relations in Southeast Asia for more than a decade. Vietnam's invasion in December 1978 was ostensibly motivated by Cambodia's violations of Vietnamese territory and by the treatment of ethnic Vietnamese in Cambodia. But to the ASEAN nations, particularly to Singapore and Thailand, the invasion appeared as a violation of the fundamental principle on which ASEAN was based: the absolute sovereignty of member states and non-interference in their internal affairs. If large nations could absorb smaller neighbors with impunity, then no small state was safe. Singapore's very existence could be jeopardized if the principle that larger nations could not unilaterally remake the boundaries of the region were abandoned.
Singapore responded to the Vietnamese invasion with a clear and forceful position. The nation would lead the diplomatic campaign against Vietnamese occupation of Cambodia, pushing ASEAN to take a united stand on the issue, and building international support for the proposition that Vietnam should withdraw. For thirteen years (1978-1991), Cambodia remained occupied by Vietnamese forces, and for thirteen years Singapore maintained its position that this occupation was fundamentally illegitimate and that ASEAN must remain united in refusing to recognize the Vietnamese-installed government in Phnom Penh.
This was not a costless position. Vietnam was a major regional power, far stronger militarily than Singapore. The Soviet Union supported Vietnam. Economic pressure from Vietnam could have damaged Singapore's interests. But Singapore's leaders—particularly Foreign Minister S. Dhanabalan and later Prime Minister Lee Kuan Yew—saw the Cambodia issue not as a regional squabble but as a test of whether a rules-based regional order could survive. If ASEAN accepted the Vietnamese occupation of Cambodia, then the principle that large nations could not absorb small neighbors had been abandoned. The message to Indonesia and the Philippines would be that ASEAN's commitment to mutual security was limited to the strongest of the five.
Singapore's position was vindicated in 1989, when international pressure—orchestrated through ASEAN and backed by the United States, China, and other powers who opposed the Vietnamese invasion—finally began to have an effect. Vietnam, exhausted by the occupation and facing international isolation, began the process of withdrawal. By 1991, the withdrawal was complete, and a negotiated settlement had been reached that allowed the Cambodian people to choose their own government through elections. This was a triumph for ASEAN diplomacy, and it was Singapore, more than any other ASEAN member, that had kept the coalition together and maintained the pressure for thirteen years.
The Cambodia episode established something crucial: ASEAN could, when necessary, act as a unified bloc to defend the interests of its members against external pressure. The consensus principle, which could have paralyzed ASEAN in the face of a major challenge, instead proved flexible enough to allow the organization to respond. Every ASEAN member joined in the diplomatic campaign against Vietnamese occupation. The mechanism was not majority voting but consensus—each member chose to support the common position because each member understood that if the rule of non-interference and sovereign equality were abandoned, then no member was safe.
Beyond the Vietnam-Cambodia conflict, Singapore's relationships with its neighbors became more complex and more important as the years passed. Singapore had once been part of Malaysia, and the separation in 1965 had been acrimonious. Two critical issues—water supply and land use—continued to define the relationship between the two countries. Malaysia supplied Singapore with water from Johor under a series of bilateral water agreements dating to 1961 and 1962. Without this water, Singapore would face chronic water shortage; with it, the nation could sustain its population and its industrial base. But the water supply relationship also represented a dependence: Malaysia could theoretically restrict water exports to Singapore and create a crisis. Singapore, recognizing this vulnerability, began in the 1970s to invest in desalination technology and in the development of alternative water sources, including water from Malaysia's Johor River and the recycling of wastewater. By the 1990s, the goal was to reduce dependence on imported water, though complete independence proved impossible.
The second critical issue was land. Singapore is one of the most densely populated nations on earth, with very limited land area. Much of the land is low-lying and vulnerable to flooding. Malaysia, by contrast, has vast tracts of relatively empty land just across the causeway that connects Johor to Singapore. For decades, there has been discussion of the possibility of land reclamation or development that would reduce Singapore's land constraints. But each such discussion has been fraught with Malaysian sensitivities about territorial integrity and environmental concerns about mangrove swamps and fisheries in the Johor Strait. These discussions have sometimes flared into diplomatic incidents, such as when Malaysia objected to Singaporean land reclamation projects, claiming they violated the 1927 Johor-Singapore Boundary Agreement.
Beyond water and land, there was the issue of Pedra Branca, a small rocky outcrop in the waters off the eastern coast of Singapore. The island was strategically important as the location of a lighthouse. Malaysia and Singapore had disputed ownership of the island for decades. In 2008, the International Court of Justice ruled that Pedra Branca belonged to Singapore, but that a smaller rock formation called Middle Rocks belonged to Malaysia. The judgment was a victory for Singapore, but it also reflected the reality that both nations had legitimate claims based on different interpretations of colonial-era treaties. The fact that the dispute went to the International Court of Justice, rather than being resolved through military force or ultimatum, reflected both nations' commitment to international law, even when the outcome was less than favorable to one party.
The relationship with Malaysia was further complicated by the issue of the Malayan Railway. Much of the railway line connecting Malaysia to Singapore ran through Singaporean territory. In the years after separation, Malaysia had allowed the railway to fall into disrepair and had eventually abandoned it as an instrument of traffic between the two nations. In more recent years, there has been discussion of rehabilitating the line and making it a functioning link between the two countries. But the railway also represents something deeper: the severed connection between Malaysia and Singapore, a physical reminder of a separation that was supposed to be temporary but became permanent.
The personality of Malaysian Prime Minister Mahathir Mohamed significantly shaped Singapore-Malaysia relations from 1981 to 2003, when Mahathir was in power. Mahathir was a Malay nationalist who was skeptical of Singapore's economic dominance in the region and of what he saw as Singapore's disproportionate influence in ASEAN. At the same time, both Mahathir and Lee Kuan Yew had a certain respect for each other's capabilities and a shared interest in Southeast Asian development. The relationship was often tense, but both nations recognized that open conflict would be mutually destructive. In recent years, there has been discussion of a Johor-Singapore Special Economic Zone, a joint development project that would facilitate economic integration between the two nations and create opportunities for growth that benefit both.
Singapore's relationship with Indonesia was even more complex than its relationship with Malaysia. Indonesia was a neighbor of overwhelming size and power. In the 1960s, before Singapore's independence, Indonesia and Malaysia had been in open conflict during the period of Konfrontasi, when Indonesia's President Sukarno had sought to destabilize Malaysia. During this period, there were concerns that Indonesia might also turn against Singapore. After separation, the relationship slowly improved, but there remained an underlying tension rooted in Indonesia's historical dominance and Singapore's economic dynamism.
One issue that periodically inflamed Indonesia-Singapore relations was the matter of natural resources. Singapore, lying on the Strait of Malacca, derives much of its value from its position as a entrepôt and as a shipping center. But some of the sand used in Singapore's land reclamation projects comes from Indonesia—or at least it did until Indonesia in 2007 banned the export of sand, citing environmental concerns and the principle that Indonesia's resources should not be exported to develop a foreign country. The sand trade had enriched some Indonesian regional governments and traders, but environmental advocates in Indonesia had pushed back against what they saw as the unsustainable extraction of sand for Singapore's reclamation projects. The ban created problems for Singapore's continued expansion.
More dramatically, there was the matter of the execution of two Indonesian marines in 1968. These marines had bombed MacDonald House on Orchard Road on 10 March 1965, killing three civilians — Suzie Choo, Juliet Goh, and Mohamed Yasin — and injuring over thirty others. Under Singapore law, they were convicted and executed. The executions created lasting anger in Indonesia, where the men were seen as martyrs in Indonesia's defense. For years, there was a memorial to them in Indonesia that served as a focal point for anti-Singapore sentiment. The incident illustrated the tension between Singapore's rule of law and the passions that national grievance could arouse.
By the 1990s, the relationship with Indonesia had improved substantially. The two nations had developed significant trade relationships, and Indonesia's economic opening under the reforms of the 1980s and 1990s created opportunities for Singaporean investment. Singaporean banks and firms became major players in the Indonesian economy. Yet the relationship remained shadowed by the difference in size and power. Indonesia was a nation of 250 million people; Singapore was a city-state of less than five million. Indonesia was a developing nation with vast natural resources; Singapore was a developed nation with no natural resources. This asymmetry meant that Indonesia could not achieve the kind of economic success that Singapore had achieved without fundamentally changing its internal organization and governance.
ASEAN itself evolved over the decades, but it remained true to the original principles that Rajaratnam had articulated. The organization was based on consensus, which meant that every member had to agree before any action could be taken. This prevented the organization from taking decisive action on issues where one member disagreed with the others, but it also meant that the organization could serve as a forum where smaller states could resist the pressure of larger powers. The principle of non-interference meant that ASEAN did not intervene in the internal affairs of its members, even when those internal affairs involved violations of human rights or democratic principles. This non-interference principle was both a strength and a weakness. It was a strength because it protected smaller nations from the interference of larger ones. It was a weakness because it meant that ASEAN could not collectively address issues like the military coup in Myanmar in 1962, or the suppression of political freedoms in any of its members.
This weakness became most apparent in the Myanmar crisis that began in 2021. In February 2021, Myanmar's military staged a coup, overthrowing the elected government of Aung San Suu Kyi and her National League for Democracy. The coup provoked massive protests and civil disobedience in Myanmar, and there were concerns that the military would resort to violence to suppress dissent. ASEAN, traditionally bound by the principle of non-interference, was initially very cautious in its response. But the scale of the military crackdown—hundreds of protesters killed—eventually forced ASEAN to take a more assertive stance. The organization demanded that Myanmar allow humanitarian aid, that it engage in dialogue with opposition forces, and that it commit to a timeline for elections. These demands went further than ASEAN had ever gone in intervening in a member's internal affairs, and they reflected the principle that there are limits to what non-interference can accommodate.
Yet even after the coup, ASEAN remained unwilling to suspend Myanmar's membership or to take stronger action that might force the military government to change course. This reflected the underlying tension in ASEAN's commitment to non-interference. The organization could not, without fundamentally changing its nature, become a vehicle for enforcing democratic or human rights standards. But it also could not, in the face of gross violations, maintain complete silence. The Myanmar crisis of 2021-2026 thus represented the most severe test that ASEAN's founding principles had faced since Vietnam's invasion of Cambodia. And unlike the Cambodia case, where ASEAN eventually succeeded in building a coalition that secured Vietnamese withdrawal, the Myanmar case saw ASEAN unable to move beyond statements of concern and calls for dialogue.
The "ASEAN Way" had enabled a region that had been characterized by conflict and mutual suspicion to achieve peaceful coexistence and gradual cooperation. But that same way—based on consensus and non-interference—created fundamental limitations on what ASEAN could achieve when member states moved sharply in different directions. Singapore's commitment to ASEAN remained strong throughout the post-1967 period, but Singapore's leaders were also clear-eyed about ASEAN's limitations. The organization was a tool for advancing Singapore's interests, but it was not a substitute for Singapore's own diplomatic efforts, military preparedness, and cultivation of relationships with powers outside the region.
Water, Land, and the Malaysia Relationship
The bilateral relationship with Malaysia was distinguished by its intimacy and its tensions in roughly equal measure. Singapore and Malaysia shared a common currency until 1967, a common stock exchange until 1990, and cultural, familial, and economic ties so dense that the separation of 1965 was never quite complete in human terms even as it was absolute in political ones. Thousands of Malaysians crossed into Singapore daily for work; thousands of Singaporeans drove into Johor for weekends and groceries. The Causeway linking Johor Bahru to Woodlands was one of the most heavily used border crossings in the world.
Water remained the most existential dimension of this relationship. Singapore's 1961 and 1962 water agreements with Malaysia guaranteed supply from the Johor River at preferential rates, but these agreements were subject to renegotiation and were sometimes wielded by Malaysian politicians as leverage in broader disputes. Singapore responded with a systematic program to achieve water security: NEWater, Singapore's advanced water reclamation technology, recycled wastewater into potable quality water meeting international standards; desalination plants began converting sea water into fresh water; and reservoirs captured rainwater across the island. By the 2020s, Singapore had substantially reduced its dependence on Malaysian water, though imports remained part of the supply picture.
The proposed Johor-Singapore Rapid Transit System Link, negotiated over years of frustrating back-and-forth between the two governments, illustrated the complexities of bilateral infrastructure cooperation. The RTS Link, a short rail connection between Johor Bahru's Bukit Chagar station and Singapore's Woodlands North station, was proposed, agreed upon, delayed, suspended, and ultimately confirmed to proceed by the late 2020s—a trajectory that tracked the ebbs and flows of bilateral relations. Every major Malaysian election had implications for Singapore-Malaysia relations, as different political coalitions had different views of the relationship with their smaller southern neighbor.
The South China Sea: Principle over Comfort
Singapore's approach to the South China Sea dispute exemplified its foreign policy philosophy at its most principled—and most commercially consequential. China claimed approximately ninety percent of the South China Sea under the "nine-dash line," a territorial claim that overlapped with the exclusive economic zones of Vietnam, the Philippines, Malaysia, and Brunei. These claims were rejected in a 2016 arbitration ruling under UNCLOS, which Singapore had helped to create. Singapore, with no territorial claim of its own in the South China Sea, had no direct stake in the arbitration outcome. But as a state that depended on freedom of navigation—approximately eighty percent of Singapore's trade transited the South China Sea—and as a committed adherent to UNCLOS-based international law, Singapore had a fundamental interest in how the dispute was resolved.
Singapore's position—that the arbitration ruling was legally binding and that the South China Sea disputes should be resolved through international law—put it at odds with China's position that the ruling was "null and void" and that disputes should be resolved bilaterally between China and each claimant. Singapore did not join in condemning China publicly with the kind of directness that might characterize a Vietnamese or Philippine official statement. But it consistently maintained, in ASEAN forums and bilaterally, that international law had to be respected and that the UNCLOS framework had to be the basis for resolution. This produced friction with China, which saw Singapore as using the South China Sea issue to reinforce American and Western positions under a veneer of legal principle.
Indonesia and the Long Shadow of Konfrontasi
Singapore's relationship with Indonesia was shaped by a history that predated independence and that touched questions of race, religion, and regional power that made it inherently more charged than the relationship with Malaysia. Indonesia, at independence in 1945, was the largest nation in Southeast Asia by population, territory, and potential. Its founding ideology—Pancasila, with its five principles of nationalism, humanitarianism, democracy, social justice, and monotheism—was consciously inclusive, attempting to unite an extraordinarily diverse archipelago of three hundred ethnic groups and hundreds of languages around a secular national identity.
Yet the relationship between Singapore and Indonesia was burdened by specific incidents whose weight proved very durable. In 1968, two Indonesian marines—Harun bin Said and Osman bin Haji Mohamed Ali—were hanged in Singapore for their role in a 1965 bombing at MacDonald House in the Orchard Road area, part of Indonesia's Konfrontasi campaign against Malaysia-Singapore. Three people were killed and more than thirty injured. The men were tried, convicted, and sentenced under Singapore's legal process. Singapore executed them on 17 October 1968, despite Indonesian pleas for clemency.
The hangings provoked an outpouring of anger in Indonesia. The Indonesian government and press characterised the executed men as heroes who had died for Indonesia. A monument was erected to them. Anti-Singapore demonstrations occurred. Diplomatic relations were strained for years. In Indonesia's cultural memory—particularly among nationalist and military circles—the hangings remained a live grievance for decades, cited as evidence of Singapore's arrogance and its willingness to execute fellow Southeast Asians on the authority of colonial-inherited law.
For Singapore, the hangings were simply the application of the rule of law. The men had committed murder. Singapore's law prescribed the death penalty. The government would not exempt foreign nationals from that law because of diplomatic pressure. To do so would have been to signal that Singapore's legal process was available to be overridden by external states, a precedent intolerable for a small nation establishing its sovereign authority. The hangings thus exemplified, in concentrated form, the tension between Singapore's rule-of-law commitment and regional relationship management—a tension that would arise repeatedly in other contexts over subsequent decades.
ASEAN's Structural Evolution
ASEAN itself evolved substantially from the loose consultative forum of its founding into a more institutionalised organisation with broader membership, a secretariat, and more ambitious integration goals. The admission of Vietnam in 1995, Laos and Myanmar in 1997, and Cambodia in 1999 expanded ASEAN from its original five members to ten, covering the entire Southeast Asian mainland and archipelago. This expansion reflected the post-Cold War normalisation of regional relations and created new opportunities for economic integration. It also diluted ASEAN's decision-making, as the new members—particularly Vietnam, Laos, and Myanmar—were substantially less developed and had governance systems quite different from the original ASEAN members.
The ASEAN Charter, adopted in 2007, transformed the organisation from an informal consultative body into one with legal personality, a formal human rights body, and more structured institutional architecture. Singapore was generally supportive of this institutionalisation, seeing it as consistent with the rule-of-law approach to regional order. But Singapore also recognised that the consensus principle that had made ASEAN work—ensuring that no member could be outvoted on matters affecting its core interests—would remain sacrosanct. The Charter's mechanisms for managing disagreements were more sophisticated than the original Bangkok Declaration's, but they preserved the fundamental principle that ASEAN would act only when all members agreed.
The ASEAN Economic Community (AEC), launched formally on 31 December 2015, aimed to create a single market and production base among the ten member states, with free movement of goods, services, capital, and (eventually) skilled labour. For Singapore, the AEC was both an opportunity and a confirmation. The country had long been the most open economy in ASEAN, and the AEC's liberalisation requirements were less demanding for Singapore than for its more protectionist neighbours. But regional market integration expanded the effective hinterland available to Singapore-based businesses—a logistics hub serving an integrated ASEAN market of 700 million people was substantially more valuable than one serving a fragmented market of ten separate economies.
The Batam-Bintan Growth Triangle and Regional Integration
In 1989, Singapore formally proposed the Indonesia-Malaysia-Singapore Growth Triangle (IMS-GT), a concept that linked Singapore's capital, technology, and international connectivity with Johor's land and Malaysian labour, and with Indonesia's Riau Islands — Batam and Bintan — offering vast territory and a large potential labour force at a fraction of Singapore's costs. The proposal was as much an act of economic geography as it was diplomacy: Singapore acknowledged that its own physical constraints — no land, no cheap labour — were permanent features rather than temporary shortages, and that the solution was to integrate economically with the territories that had what Singapore lacked.
Batam had been developed as an industrial zone since 1978 under Indonesia's Batam Industrial Development Authority, but investment had been modest. The Growth Triangle concept, combined with the opening of Singapore's Batam ferry terminal and the establishment of the Batamindo Industrial Park in 1990 — a joint venture between Singapore's Sembcorp and Indonesian partners — accelerated investment dramatically. By the mid-1990s, Batam had more than two hundred factories producing electronics, precision components, petrochemicals, and garments for Singapore-based multinationals seeking to extend their production capacity without paying Singapore wages. The arrangement was a textbook demonstration of economic complementarity: Singapore provided capital, management expertise, logistics connections to global markets, and the regulatory and financial infrastructure that foreign investors required; Riau provided cheap land, available labour, and the scale that Singapore's two-hundred-and-twenty-four square miles could never offer.
Bintan saw a different kind of integration. The Bintan Resorts International project — a joint venture launched in 1994 spanning more than twenty-three thousand hectares of Bintan's northern coast — developed an integrated tourism zone catering primarily to Singaporean weekend visitors, who could reach Bintan from Tanah Merah ferry terminal in under an hour. Golf courses, beach resorts, water parks, and industrial estates co-existed in a zone that was explicitly designed to complement Singapore's urban density with Bintan's natural environment. The combination of industrial and tourism integration on the two islands illustrated the Range of what the Growth Triangle concept could accommodate.
The 2007 Singapore-Indonesia Framework Agreement on Economic Cooperation in the Batam-Bintan-Karimun (BBK) Special Economic Zone provided specific investment protection frameworks that had been lacking in the original Growth Triangle arrangements — creating a more formal basis for Singapore investment that addressed Indonesian legal uncertainties about foreign ownership, land use rights, and dispute resolution. Investment in the BBK zone accelerated following the agreement, with Singapore-linked companies establishing manufacturing facilities that benefited from Indonesian labour costs while maintaining Singapore management, quality systems, and logistics connections.
The relationship was not frictionless. Indonesian nationalists periodically questioned whether Singapore was extracting value from Indonesian territory and labour without adequate return. The sand dredging controversy was the most concrete expression of this tension: Singapore's extraordinary land reclamation programme, which added more than 130 square kilometres to the island's area between 1965 and the 2010s, depended for many years on sand dredged from Indonesian territorial waters. The ecological damage to Indonesian coastal and marine environments from decades of intensive sand extraction was substantial, and the political discomfort in Indonesia — watching its seabed literally disappear to build a neighbouring country's territory — led to an Indonesian ban on sand exports in 2007. Singapore was forced to diversify its reclamation material sources, turning to quarry rock, clay, and sand from Cambodia, Malaysia, and other suppliers.
Vietnam and the Former Indochina: Singapore's Westward Reach
Singapore's relationship with Vietnam illustrated its pragmatic willingness to engage regardless of ideological differences, provided the commercial and strategic case was clear. Singapore was among the first ASEAN states to restore substantive economic relations with Vietnam after the resolution of the Cambodia conflict — a calculated position that Vietnam's rapidly developing economy and population of over seventy million represented an opportunity that could not be deferred for reasons of ideological solidarity with ASEAN members who remained suspicious of Hanoi.
Singapore companies moved into Vietnam from the mid-1990s at scale. Mapletree Investments, the Singapore government-linked real estate company, developed logistics and industrial properties that served the manufacturing companies flooding into Vietnam's export-processing zones. CapitaLand, Singapore's largest property developer, built residential and commercial projects in Hanoi and Ho Chi Minh City catering to Vietnam's growing middle class and to the expatriate workforce of multinationals establishing Vietnamese operations. Keppel Corporation developed industrial zones, port facilities, and infrastructure that leveraged Singapore's engineering expertise in a market with enormous infrastructure deficits.
The Vietnam Singapore Industrial Parks — VSIP — were the most systematic expression of Singapore's approach. The first VSIP, established in 1996 in Binh Duong province near Ho Chi Minh City, was a joint venture between Sembcorp Industries and the Becamex IDC Corporation, a Vietnamese state enterprise. The VSIP model offered manufacturing companies a complete solution: serviced land, reliable power and water, professional management, logistics connections, and a regulatory environment that, within the zone's boundaries, was more consistent and transparent than the general Vietnamese investment environment. The model worked. By the 2020s, VSIP had expanded to eight locations across Vietnam, from Ha Tinh in the north to Long An in the south, and had attracted billions of dollars in manufacturing investment from companies across Asia, Europe, and North America. VSIP became a template that Singapore companies sought to replicate in other Southeast Asian markets.
The strategic dimension of the Vietnam relationship was as important as the commercial one. Vietnam's assertive resistance to Chinese claims in the South China Sea — backed by its own historical experience of Chinese dominance across a millennium — aligned with Singapore's fundamental interest in maintaining a rules-based maritime order governed by UNCLOS. The two countries developed a quiet strategic convergence: neither made the alignment explicit, and Singapore was careful never to appear to be orchestrating opposition to China, but at ASEAN meetings and in bilateral consultations, the Vietnamese and Singaporean positions on South China Sea legal frameworks consistently reinforced each other. Singapore's investment in Vietnamese infrastructure and industrial capacity also strengthened Vietnam's economic resilience and its capacity to resist pressure — an indirect contribution to the regional balance that Singapore valued without advertising.
The Johor-Singapore Special Economic Zone
After decades of managed competition and periodic acrimony, the Malaysia-Singapore relationship entered a new phase of deliberate integration with the announcement in January 2024 of the Johor-Singapore Special Economic Zone (JS-SEZ) — a joint development covering 3,571 square kilometres in Johor Bahru district, an area almost five times the size of Singapore itself. The JS-SEZ was the most ambitious bilateral economic initiative the two countries had ever attempted, and it reflected a shared assessment that the opportunities created by global supply chain restructuring were large enough to justify the institutional investment required to make deep integration work.
The JS-SEZ's design was built around a key commercial insight: the semiconductor and advanced manufacturing industries scrambling to diversify away from Taiwan and China were looking for locations that combined first-world regulatory reliability with developing-world cost advantages. Neither Singapore nor Johor alone could offer both — Singapore had the regulatory environment but not the cost advantage or the land; Johor had land and lower costs but lacked Singapore's infrastructure and regulatory credibility. Together, they could offer something that few other locations in the world could match. A company could design and manage its operations from Singapore, manufacture in Johor, and export through Singapore's port and airport — combining the best attributes of both jurisdictions in a single production footprint.
The enabling infrastructure was the Johor-Singapore Rapid Transit System (RTS Link), a cross-border rail connection linking Bukit Chagar in Johor Bahru to Woodlands North in Singapore. The project had been proposed, agreed, cancelled, renegotiated, and finally confirmed to proceed, with an opening target of 2026. The RTS Link would radically reduce transit times for the daily commuter flows across the Causeway — flows that by the early 2020s exceeded three hundred thousand crossings per day, making it one of the world's busiest land border crossings. With the RTS, a worker living in Johor could reach a Singapore office in under fifteen minutes; a manager overseeing JS-SEZ manufacturing could reach a factory floor from a Singapore headquarters in twenty minutes.
The JS-SEZ framework created specific regulatory innovations: a fast-track business registration regime, customs facilitation arrangements, integrated utilities infrastructure, and a dedicated dispute resolution mechanism administered jointly by Singapore and Malaysian institutions. These specifics mattered because the historical obstacle to deeper Malaysia-Singapore economic integration had never been goodwill — both governments periodically expressed it — but rather the institutional friction created by different regulatory systems, different legal frameworks, and the political sensitivities that surrounded any arrangement that appeared to give Singapore privileged access to Malaysian territory. The JS-SEZ attempted to resolve these issues through a comprehensive framework rather than case-by-case negotiations, reflecting a shared recognition that the opportunity was too large to approach incrementally.
The Land Reclamation Disputes and Maritime Boundaries
Singapore has reclaimed approximately 25 percent of its current land area from the sea since independence — expanding from 581 square kilometres in 1965 to approximately 730 square kilometres by the 2020s. The scale of the programme, sustained across six decades of continuous dredging, engineering, and landscaping, transformed Singapore's physical geography in ways that created both economic opportunity — the Jurong Island petrochemical complex, Marina Bay's central business district, Changi Airport's later terminal expansions — and diplomatic friction with neighbouring states whose territorial waters and marine environments were affected by the extraction of reclamation materials.
For decades, much of the sand required for Singapore's reclamation came from Indonesia and Malaysia. Sand dredging from Indonesian territorial waters, particularly from the Riau Islands, provided the raw material for some of Singapore's most ambitious land creation projects. The ecological consequences of sustained dredging — damage to coral reefs, erosion of Indonesian coastal and island environments, alteration of sediment flows — accumulated over years without adequate international attention. In 2003, Indonesia banned all exports of marine sand to Singapore, citing environmental damage to Indonesian territorial islands and raising concerns that the progressive seaward extension of Singapore's baseline was altering maritime boundary calculations in ways that disadvantaged Indonesia. Malaysia imposed its own sand export restrictions. The bans forced Singapore to diversify its reclamation material sources: Cambodia became a significant supplier for a period, and alternative materials including quarried granite, clay, and engineered fill progressively supplemented or replaced marine sand in some applications.
The maritime boundary dimension of Singapore's reclamation programme was genuinely sensitive. As Singapore extended its landmass seaward through reclamation, its territorial baseline — the low-water line from which territorial sea, contiguous zone, and exclusive economic zone boundaries are measured — shifted. In narrow straits already subject to competing Malaysian and Singaporean maritime claims, these shifts had practical implications for navigation, fishing rights, and the legal status of waters that had historically been treated as one jurisdiction's territory. The 2003 Case Concerning Land Reclamation in and around the Straits of Johor, brought by Malaysia against Singapore to the International Tribunal for the Law of the Sea (ITLOS), alleged that Singapore's reclamation work near Pulau Tekong was causing environmental harm to Malaysian territorial waters and altering navigation conditions in the straits. ITLOS issued provisional measures requiring the two states to establish a joint technical group to study the effects of Singapore's reclamation work, and the case was ultimately resolved in 2005 through a bilateral agreement that established a monitoring framework, required information sharing, and committed Singapore to implementing mitigation measures while preserving Singapore's right to continue its reclamation programme within agreed safeguards. The resolution was orderly and diplomatic — the kind of outcome that Singapore's commitment to international legal frameworks was designed to achieve — but it demonstrated that the physical transformation of Singapore's geography had implications for regional relationships that purely domestic engineering decisions could not contain.
The land reclamation programme illustrated, at the most literal level, Singapore's fundamental geographical constraint: its territory was finite, its population and economic aspirations were not, and the only available solution — other than radical densification of an already dense city — was to create new land from the surrounding sea. This constraint drove domestic policy (high-rise public housing, mixed-use zoning, underground space development) and regional diplomacy simultaneously. A state that must manufacture its own territory cannot treat the surrounding maritime environment as a matter of pure environmental concern separate from existential economic need.
Malaysia: The Long Reconciliation
The Singapore-Malaysia relationship improved substantially from the early 2000s onward, after decades of managed tension in which the two governments maintained functional working relationships while accumulating unresolved bilateral disputes that periodically flared into public friction. The improvement was driven in part by generational change — leaders who had lived through the 1965 separation and carried its emotional weight gave way to successors who experienced the bilateral relationship primarily through its practical and economic dimensions rather than its historical grievances. It was driven also by the recognition, growing on both sides, that economic complementarity between Singapore and Malaysia was sufficiently strong that both countries left significant value on the table by failing to integrate more deeply.
Multiple legacy disputes moved toward resolution across the 2000s and 2010s. The water agreements of 1961 and 1962 — which had locked in extraordinarily low prices of three Malaysian sen per thousand gallons of raw water until 2011 and 2061 respectively — were a source of recurring tension as Malaysian politicians periodically argued that the pricing was exploitative of Malaysian resources. Singapore, for its part, had invested enormously in the treatment and distribution infrastructure that made the raw water usable, and argued that the final water price reflected both the raw water cost and the infrastructure investment. The water pricing dispute, while never fully resolved to both sides' satisfaction, became less acute as Singapore's domestic alternatives — NEWater, desalination — reduced the practical dependence on Malaysian supply even as the legal agreements remained in force.
The Malayan Railway (KTM Berhad) issue, rooted in a 1918 agreement that gave Malaysia operating rights over the railway line running through Singapore's territory, including the Tanjong Pagar railway station in central Singapore, was resolved in 2010 when Malaysia agreed to relocate the terminus to Woodlands in exchange for jointly developing the former railway land. The Tanjong Pagar station, an art-deco structure whose incongruous presence in the middle of a modern city had become a minor Singapore landmark, closed in 2011 — ending an arrangement that had symbolised the incompleteness of Singapore's post-separation sovereignty over its own territory.
The Pedra Branca dispute, concerning sovereignty over a small island at the eastern entrance to the Singapore Strait where the Horsburgh Lighthouse stood, was resolved by the International Court of Justice in 2008 in a ruling that awarded Pedra Branca to Singapore while granting Malaysia sovereignty over nearby Middle Rocks. Both parties had accepted ICJ jurisdiction and committed to abide by the outcome — an unusual willingness to submit a sovereignty dispute to third-party adjudication that reflected both countries' genuine commitment to international legal frameworks as dispute resolution mechanisms.
Najib Razak's administration in Malaysia (2009-2018), despite its ultimately catastrophic internal governance failures, maintained pragmatic bilateral engagement with Singapore on economic and infrastructure matters. The Iskandar Malaysia development zone in southern Johor, launched in 2006, attracted significant Singapore investment and created a formal joint development framework for the border area. Subsequent administrations — Mahathir's 2018-2020 government, Muhyiddin's, Ismail Sabri's, and then Anwar Ibrahim's — each brought somewhat different tones and priorities to the bilateral relationship, but the underlying trajectory was toward deeper practical integration driven by economic logic that political differences could slow but not reverse. Under Prime Minister Lawrence Wong and Prime Minister Anwar Ibrahim, the relationship entered its most collaborative phase since separation, with the Johor-Singapore Special Economic Zone representing an ambition for joint development at a scale that neither side had previously attempted — a recognition that economic complementarity between Singapore's capital and regulatory quality and Johor's land, labour, and proximity created genuine mutual advantage that neither could achieve in isolation.