World War, 1914-1918 History 394 Politics and government 185 Causes 164 Campaigns 159 Foreign relations 149 Economic aspects 140 more ... Influence 82 Diplomatic history 80 Peace 75 World War, 1939-1945 59 Social conditions 56 Social aspects 54 Economic conditions 52 Territorial questions 45 Soldiers 40 Finance 37 World politics 33 Reparations 32 Naval operations 29 History and criticism 28 Women 28 Neutrality 25 Nationalism 23 History, Military 22 Food supply 21 Propaganda 21 Public opinion 20 Literature and the war 19 War 19 less ...