History 2,536 Politics and government 743 Description and travel 490 Social conditions 474 Histoire 457 Social life and customs 432 Race relations 326 more ... African Americans 304 Civilization 220 Economic conditions 179 Antiquities 177 Frontier and pioneer life 171 Foreign relations 167 Travel 145 Indians of North America 123 Politique et gouvernement 123 Ethnic relations 119 Indians of Mexico 103 Manners and customs 97 Indians of South America 96 Relations 95 Jews 90 Mayas 87 Slavery 85 Discovery and exploration 83 Civil rights 82 Descriptions et voyages 78 Conditions sociales 77 Emigration and immigration 76 Social aspects 72 less ...