World War, 1939-1945 1,411 History 556 Campaigns 159 Foreign relations 130 Politics and government 122 Holocaust, Jewish (1939-1945) 111 Diplomatic history 95 Social conditions 93 Atrocities 72 Jews 72 Social aspects 66 Public opinion 64 History and criticism 59 Causes 58 Social life and customs 58 Propaganda 52 Social history 49 Influence 48 Mass society 47 Literature and the war 45 Economic aspects 44 World War, 1914-1918 44 Social surveys 41 Underground movements 41 National socialism 38 Secret service 38 Concentration camps 37 Women 34 Motion pictures and the war 31 Psychological aspects 26