History 375 Social conditions 66 Race relations 64 Frontier and pioneer life 63 Politics and government 61 African Americans 47 Histoire 45 more ... Social life and customs 34 Social aspects 31 Description and travel 27 Slavery 26 Ethnic relations 19 Indians of North America 19 Reconstruction (U.S. history, 1865-1877) 18 Intellectual life 17 Plantation life 16 Violence 16 History, Military 15 Discovery and exploration 14 Economic conditions 14 Political culture 14 Civilization 13 Political aspects 13 Racism 13 Territorial expansion 13 Mormons 12 Nationalism 12 Pioneers 12 Secession 11 Elite (Social sciences) 10 less ...