History Politics and government 18 Social conditions 17 Civilization 15 Black people 13 Slavery 13 Architecture 11 more ... Social life and customs 10 Enslaved persons 7 Manners and customs 7 Colonies 6 Portuguese 6 Race relations 6 Economic conditions 5 Education 5 Ethnic identity 5 Indians of South America 5 Africans 4 Foreign relations 4 Freed persons 4 Jews 4 African influences 3 Colonization 3 Criticism and interpretation 3 Diplomatic relations 3 Ethnic relations 3 Ethnicity 3 Indigenous peoples 3 Study and teaching 3 World War, 1939-1945 3 less ...