History 634 Social conditions 247 Politics and government 234 Black people 152 Economic conditions 140 Popular music 135 Social aspects 133 more ... History and criticism 131 Race relations 118 Civilization 96 Indians of South America 90 Social life and customs 88 Political aspects 73 Slavery 73 Foreign relations 70 Economic policy 67 Education 60 Political activity 58 Description and travel 54 Race identity 50 Brazilian literature 49 Music 48 Religion 47 Economic history 46 Manners and customs 46 Ethnic identity 44 Motion pictures 43 Women 43 International relations 40 African influences 39 less ...