History 418 Politics and government 101 Social conditions 51 African Americans 44 Social life and customs 44 Biography 40 Manners and customs 38 más ... Authors, American 37 Presidents 36 World War, 1939-1945 36 Travel 33 Biographies 30 Jews 28 Race relations 28 Criticism and interpretation 27 Families 27 Family 27 Generals 27 Legislators 26 Campaigns 25 Military campaigns 25 History and criticism 24 Intellectual life 24 Women 24 Composers 22 Histoire 22 Kings and rulers 22 Politicians 21 Physicians 20 Social aspects 20 menos ...