By the end of 1991, the Soviet Union had dissolved into 15 independent states, following exactly the boundaries of its 15 ethnic republics that had served as its administrative framework. Although the country was home to more than 100 ethnic groups, it was organized into 15 ethnically based republics and ultimately fragmented along those very lines.
Indonesia is, in fact, far more diverse. According to the 2010 Population Census compiled by Indonesia's Central Statistics Agency (BPS), the country is home to more than 1,300 ethnic groups and around 700 regional languages, spread across thousands of islands.
When the 1998 Asian financial crisis brought down Soeharto's regime, a number of observers predicted that Indonesia would become "the next Yugoslavia." That prediction never came true. According to historians and political scientists who have compared the two cases, the reason was not mere coincidence, but a fundamental difference in how the two states were built.
The Ethnic Republics That Never Existed in Indonesia
The first difference lay in the structure of the state. The Soviet Union was a federation of republics established on an ethnic basis, and its constitution even granted them the right to secede.
Article 72 of the 1977 Soviet Constitution explicitly guaranteed each republic the right to withdraw from the Union. Political scientist Henry Hale, in his study published in the journal Perspectives on Politics, argues that these ethnic republics became ready-made nation-state templates once central authority weakened.
The existence of one dominant core republic, Russia, further intensified this dynamic by creating competing claims to sovereignty. In her book Subversive Institutions, Valerie Bunce concludes that the Soviet Union's ethnic federalism, which had appeared stable under one-party rule, turned into a mechanism for disintegration once the political system loosened.
Indonesia, however, never had such a structure. It is a unitary state, and its provinces were never designed as political homelands for individual ethnic groups with the constitutional right to secede.
Historian Robert Cribb, writing in the Australian Journal of International Affairs, argues that without ethnically defined territorial units endowed with the right to secede, Indonesia lacked the institutional fault lines that ultimately brought down both the Soviet Union and Yugoslavia.
A Neutral National Language
The second factor was language. Indonesia's largest ethnic group is the Javanese, numbering more than 95 million people, yet the country adopted Bahasa Indonesia as its national language. Rooted in Malay, it was a trading language rather than the language of the dominant ethnic group.
According to Benedict Anderson in his book Imagined Communities, choosing a relatively neutral language enabled people from hundreds of different backgrounds to imagine themselves as members of a single nation without feeling that they were being dominated by one particular ethnic group.
The contrast was evident in the Soviet Union, where Russian, the language of the dominant nationality, occupied a privileged position and frequently generated resentment among the non-Russian republics.
A Nation Imagined Before the State Existed
The third factor is historical. Indonesia's national identity was formulated before the state itself came into existence. On October 28, 1928, the Youth Pledge declared one homeland, one nation, and one language, nearly two decades before the proclamation of independence in 1945.
That foundation was later reinforced by the state ideology of Pancasila and the national motto Bhinneka Tunggal Ika ("Unity in Diversity"), as historian M. C. Ricklefs explains in his book A History of Modern Indonesia.
This commitment to a unitary state was tested shortly after independence. When the Netherlands transferred sovereignty in 1949, Indonesia briefly became a federal state known as the Republic of the United States of Indonesia.
The federal system lasted less than a year. By 1950, nearly all of its constituent states had dissolved themselves and rejoined the unitary republic, largely because federalism was widely seen as a legacy of the Dutch colonial divide-and-rule strategy.
A Different Response to Separatism
The final factor concerns how Indonesia responded to separatist pressures after 1998. Rather than further centralizing power, the government implemented sweeping decentralization and granted special autonomy to the regions experiencing the most intense unrest.
Under the 1999 decentralization laws, governing authority was transferred to hundreds of regencies and municipalities rather than to ethnically defined territorial units.
In Aceh, a nearly 30-year conflict that claimed around 170,000 lives ended with the Helsinki Memorandum of Understanding on August 15, 2005, granting the province special autonomy, as documented by organizations such as the United States Institute of Peace and the Council on Foreign Relations. Papua has also held special autonomy status since 2001.
Writing in Foreign Affairs, Donald Emmerson argues that this combination of coercion and compromise enabled Indonesia to manage regional conflicts without undermining the integrity of the state.
Indonesia's survival, however, does not mean it has been free from territorial fragmentation. East Timor separated following the 1999 referendum and achieved full independence in 2002, while tensions in Papua remain unresolved.
Unlike the Soviet Union, which collapsed along the institutionalized boundaries of its ethnic republics, Indonesia confronted similar separatist pressures without a political framework capable of channeling them into the creation of multiple new states.
