History 2,144 Social conditions 400 Politics and government 361 Race relations 341 Frontier and pioneer life 311 Social life and customs 308 African Americans 213 more ... Social aspects 194 Description and travel 191 Slavery 127 Economic conditions 123 Indians of North America 114 Histoire 110 Reconstruction (U.S. history, 1865-1877) 107 History, Military 100 Ethnic relations 95 Pioneers 85 Intellectual life 78 Women 76 Civilization 75 Travel 75 Plantation life 72 Political aspects 67 Nationalism 63 Violence 60 Immigrants 59 Slaves 59 Emigration and immigration 55 Gold discoveries 51 Political culture 50 less ...