History 664 Social conditions 247 Politics and government 240 Black people 162 Social aspects 146 History and criticism 142 Popular music 139 more ... Economic conditions 135 Race relations 129 Civilization 100 Indians of South America 96 Social life and customs 96 Political aspects 79 Slavery 79 Foreign relations 76 Economic policy 64 Description and travel 60 Music 56 Political activity 56 Manners and customs 54 Race identity 54 Education 51 Ethnic identity 51 Brazilian literature 50 Religion 48 Motion pictures 47 African influences 45 Women 44 Economic history 42 International relations 41 less ...