Civilization Historiography History 39 History and criticism 10 Intellectual life 8 Study and teaching 7 National characteristics, American 6 Philosophy 6 Political aspects 6 Social aspects 6 Greek influences 5 Race relations 5 American literature 4 In literature 4 Social life and customs 4 Colonies 3 Colonization 3 English literature 3 Jews 3 Social conditions 3 Acculturation 2 Afrocentrism 2 Arabs 2 Calendar, Roman 2 Chronology, Roman 2 City and town life 2 Cold War 2 Comparative civilization 2 Foreign public opinion, American 2 Greeks 2