History 1,021 Politics and government 371 World War, 1939-1945 195 Social conditions 169 Jews 165 Ethnic relations 148 Foreign relations 138 Civilization 122 Historiography 98 Social life and customs 98 Campaigns 79 Relations 79 Economic conditions 75 Holocaust, Jewish (1939-1945) 73 Social aspects 70 Intellectual life 67 Nationalism 62 Political aspects 62 World War, 1914-1918 54 Influence 50 Vietnam War, 1961-1975 46 Antiquities 42 Description and travel 39 Arab-Israeli conflict 35 Public opinion 35 History, Military 34 Regimental histories 33 Ethnic identity 32 Ethnology 32 History and criticism 32