History 668 Politics and government 354 Foreign relations 182 Biography 168 Presidents 163 Indians of North America 151 Afro-Americans 129 Civilization 109 Social conditions 91 Race relations 86 Social life and customs 81 Civil rights 55 African Americans 52 Campaigns 43 Antiquities 41 Juvenile literature 36 National characteristics, American 36 Discovery and exploration 35 Generals 35 Sources 35 Slavery 32 World politics 32 Folklore 30 Economic conditions 29 Election 29 Presidents' spouses 29 Pictorial works 28 Description and travel 27 Wars 25 Government relations 23