Biography History 250 Presidents 200 Politics and government 167 African Americans 120 Legislators 77 Indians of North America 70 more ... Generals 65 African-Americans 64 Statesmen 58 Slaves 40 Juvenile literature 37 Foreign relations 36 Social conditions 35 Civil rights 34 Race relations 34 Abolitionists 31 Social life and customs 31 Civil rights workers 28 History and criticism 28 Women 23 Personal narratives 21 Presidents' spouses 21 African American women 20 Campaigns 20 Explorers 20 History, Military 20 Civil rights movements 19 Jews 19 Sources 18 less ...