History Colonies 275 Discovery and exploration 109 Spanish colonies 92 Discoveries in geography 90 British colonies 77 Administration 73 more ... Spanish 51 Indians of North America 50 Slavery 48 Colonization 44 Politics and government 39 Indians 37 Antiquities 28 History and criticism 28 Historiography 27 Race relations 25 Slave trade 25 Social conditions 25 Black people 23 Civilization 23 African Americans 22 First contact with other peoples 22 French colonies 22 Commerce 21 Indians, Treatment of 21 Enslaved persons 20 Histoire 20 Social life and customs 20 British 19 less ...