History Frontier and pioneer life 172 Indians of North America 59 Social conditions 48 Women 45 History and criticism 44 Territorial expansion 43 more ... Description and travel 37 Race relations 33 Social life and customs 32 Womyn 28 Discovery and exploration 27 In literature 27 Social aspects 27 Ethnic relations 25 African Americans 24 Economic conditions 23 Pioneers 23 Politics and government 23 Travel 23 Overland journeys to the Pacific 21 Wars 20 American literature 19 Historiography 19 Environmental conditions 18 Frontier and pioneer life in literature 18 Railroads 18 Emigration and immigration 17 Women and literature 17 Civilization 14 less ...