Effective nation-building brings important and positive consequences. Alliances that cut across the entire territory of a country depoliticise ethnic divisions. Politics is not perceived as a zero-sum game in which ethnic groups struggle for control of the state. Instead, more substantial policy issues concerning what the state should actually do come to the foreground of the debate. Inclusive political coalitions also foster a sense of ownership of the state and promote the ideal of a collective purpose beyond one’s family, village, clan or profession. Conformingly, citizens who identify with their nation are less resistant to paying taxes, more likely to support welfare policies, and are governed by more effective states. We also know that inclusive coalitions comprising ethnic minorities and majorities alike greatly reduce the risk of civil war and promote economic growth. [...]
A comparison between Switzerland and Belgium, two countries of similar size, with a similar linguistic composition of the population, and comparable levels of economic development, provides an example. In Switzerland, civil society organisations – such as shooting clubs, reading circles and choral societies – developed throughout the territory during the late 18th and first half of the 19th century. They spread evenly throughout the country because modern industries emerged across all the major regions, and because Switzerland’s city-states lacked both the capacity and the motivation to suppress them. In Belgium, by contrast, Napoleon, as well as the Dutch king who succeeded him, recognised the revolutionary potential of such voluntary associations, and suppressed them. Even more importantly, the associations that did exist in Belgium were confined to the more economically developed and more educated French-speaking regions and segments of the population. [...]
The examples I’ve singled out don’t account for how voluntary associations, public goods provision, and communication interact with each other or substitute for each other. Somalians, for example, all speak the same language, while Switzerland is linguistically more diverse – and yet the two histories of nation-building diverge in opposite directions. There are also additional factors that could hinder or foster nation-building. Many historians would argue that the colonial experience makes a difference. Somalia and Botswana both suffered from the divide-and-rule policies of colonial powers, which should make the task of national political integration more difficult once the colonial powers leave. Neither Russia nor Switzerland were ever under foreign rule during the past centuries. [...]
Finally, we might take a more sober perspective and consider that nation-building succeeds where countries have fought many wars with other countries, binding their populations together through shared sacrifice. Similarly, it could be that European governments could build their nations more easily because centuries of boundary adjustments and ethnic cleansings led to more homogenous populations, easier to integrate into a national polity.