Imperialism History 42 Colonies 41 Historiography 12 Social aspects 11 Colonization 7 Discovery and exploration 7 more ... History and criticism 7 Indians of North America 7 Science 7 British colonies 6 Civilization 6 Ethnic relations 5 Intellectual life 5 International relations 5 Relations 5 Discoveries in geography 4 Economic aspects 4 Frontier and pioneer life 4 Indians, Treatment of 4 Race relations 4 Social conditions 4 Spanish colonies 4 Territorial expansion 4 Administration 3 Attitudes 3 Intercultural communication 3 Natural history 3 Politics and government 3 Slave trade 3 less ...