History Politics and government 145 World War, 1939-1945 98 History and criticism 85 Social conditions 72 Political aspects 67 Social aspects 61 more ... Foreign relations 57 Race relations 48 Political activity 39 Social life and customs 37 Communism 36 Influence 35 World War, 1914-1918 35 Religious aspects 28 African Americans 26 Cold War 26 Church history 25 Music 25 Government policy 24 Vietnam War, 1961-1975 24 Intellectual life 23 Nationalism 23 Religion 23 Ethnic relations 22 Atrocities 21 Modernism (Literature) 20 Motion pictures 20 Civil rights 19 Criticism and interpretation 19 less ...