Nationalism is an idea and movement that promotes the interests of a particular nation (as in a group of people),especially with the aim of gaining and maintaining the nation’s sovereignty (self-governance) over its homeland. Nationalism holds that each nation should govern itself, free from outside interference (self-determination), that a nation is a natural and ideal basis for a polity and that the nation is the only rightful source of political power (popular sovereignty). It further aims to build and maintain a single national identity, based on shared social characteristics of culture, ethnicity, geographic location, language, politics (or the government), religion, traditions and belief in a shared singular history, and to promote national unity or solidarity. Nationalism seeks to preserve and foster a nation’s traditional cultures and cultural revivals have been associated with nationalist movements. It also encourages pride in national achievements and is closely linked to patriotism. Nationalism is often combined with other ideologies such as conservatism (national conservatism) or socialism (left-wing nationalism).