History 1,369 Politics and government 427 Social conditions 238 Description and travel 199 Social life and customs 196 Civilization 149 Race relations 131 更多 ... African Americans 126 Histoire 126 Foreign relations 125 Economic conditions 121 Ethnic relations 77 Jews 60 Antiquities 56 Relations 52 Indians of South America 50 Frontier and pioneer life 49 Indians of Mexico 40 Emigration and immigration 39 Intellectual life 39 Mayas 38 Immigrants 37 Ethnic identity 36 Black people 35 Colonies 33 Sources 32 Historic buildings 31 Indians of North America 31 Italian Americans 31 Travel 31 少 ...