History 777 Politics and government 147 History and criticism 145 Social conditions 136 Social aspects 128 Indians of North America 105 Social life and customs 105 more ... Economic conditions 100 Law and legislation 95 Research 84 African Americans 82 World War, 1939-1945 72 Foreign relations 70 Women 68 Race relations 67 Education 62 Government policy 61 Economic aspects 58 Civil rights 57 Antiquities 47 Political aspects 46 Economic policy 44 International cooperation 43 Environmental aspects 41 Legal status, laws, etc 41 Ethnic relations 39 Geology 39 Campaigns 36 American poetry 35 Medical care 35 less ...