History 1,839 Politics and government 773 Social conditions 448 Race relations 440 African Americans 385 Histoire 306 Social life and customs 266 更多 ... Civil rights 224 Civilization 166 Economic conditions 151 Politique et gouvernement 145 Foreign relations 141 Civil rights movements 138 Ethnic relations 123 Intellectual life 96 Relations 94 Political activity 91 Social aspects 91 Description and travel 85 Political aspects 78 Manners and customs 67 Jews 61 Travel 60 Mexican Americans 59 Emigration and immigration 57 Nationalism 57 Conditions sociales 55 Racism 55 Violence 54 Immigrants 52 少 ...