History 110 Colonies 50 Slavery 25 Slave trade 18 Relations 11 Slaves 11 Civilization 10 Discovery and exploration 10 Emancipation 10 Indians of North America 10 Slavery in literature 9 Politics and government 8 Social conditions 8 Administration 6 Colonization 6 Foreign relations 6 History and criticism 6 Blacks 5 British 5 Commerce 5 Emigration and immigration 5 First contact with Europeans 5 French 5 Government relations 5 Race relations 5 Spanish 5 African influences 4 Economic aspects 4 European influences 4 Imperialism 4