History 80 African Americans 50 Politics and government 40 Foreign relations 24 Race relations 16 Social conditions 15 National characteristics, American 13 more ... Political aspects 12 Presidents 12 Civilization 11 Indigenous peoples 9 Statesmen 9 Philosophy 8 Political culture 8 Social life and customs 8 Nationalism 7 Political and social views 7 Territorial expansion 7 Colonies 6 Government relations 6 Indians of North America 6 Intellectual life 6 Jews 6 Political activity 6 Social aspects 6 Antislavery movements 5 Relations 5 Antiquities 4 Cold War 4 Colonization 4 less ...