History 50.968 Politics and government 15.274 Foreign relations 9.039 African Americans 7.936 Social conditions 6.957 Social aspects 6.888 Race relations 6.688 Gehiago ... History and criticism 6.577 Civil rights 4.922 Slavery 4.906 Law and legislation 4.816 Political aspects 4.360 Presidents 4.346 Government policy 3.834 Racism 3.622 Economic conditions 3.444 Education 3.198 Civil rights movements 3.095 Women 2.989 Economic aspects 2.657 Social life and customs 2.391 American literature 2.325 World War, 1939-1945 2.309 Research 2.230 Civilization 2.165 Emigration and immigration 1.991 Study and teaching 1.930 Prevention 1.897 Relations 1.838 Intellectual life 1.827 gutxiago ...