History 745 Social conditions 224 Politics and government 198 Social life and customs 179 Race relations 110 Antiquities 108 Ethnic relations 107 Description and travel 80 African Americans 75 Economic conditions 74 Frontier and pioneer life 73 Social aspects 64 Mayas 56 Immigrants 54 Civilization 49 Ethnic identity 47 Travel 40 Emigration and immigration 39 Excavations (Archaeology) 39 Indians of North America 39 Jews 37 Civil rights 36 Indians of South America 34 Religion 33 Rites and ceremonies 32 Mexican Americans 31 Historiography 29 Community life 28 Governors 26 Intellectual life 26