In a nationalist's view, what defines a nation?

a shared identity based on culture or language

geographical boundaries created in earlier historical periods

a sense of loyalty to a leader and members of the aristocracy

a unified set of beliefs communicated by religious leaders

"A shared identity based on culture or language" defines a nation in a nationalist's view.

Nationalism is a political, social, and economic ideology and movement characterized by the promotion of the interests of a particular nation, particularlly with the purpose of gaining and maintaining the nation's sovereignty (self-governance) over its homeland.

According to Nationalism, each nation should govern itself, without outside interference.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

it granted civil rights to african americans.