Answer:
to promote peace
Step-by-step explanation:
Nationalism holds that each nation should govern itself, free from outside interference, that a nation is a natural and ideal basis for a polity and that the nation is the only rightful source of political power. It further aims to build and maintain a single national identity, based on shared social characteristics of culture, ethnicity, geographic location, language, politics, religion, traditions and belief in a shared singular history, and to promote national unity or solidarity.