Politics and government World War, 1914-1918 History 89 Foreign relations 51 Causes 45 International relations 39 Influence 38 more ... Diplomatic history 24 Social aspects 24 Peace 18 Social conditions 18 Territorial questions 18 World politics 13 World War, 1939-1945 10 Economic conditions 8 Nationalism 8 Intellectual life 7 Political aspects 7 War and society 7 Reconstruction (1914-1939) 6 Colonies 5 Diplomatic relations 5 Economic aspects 5 Ethnic relations 5 Influence (Literary, artistic, etc.) 5 Mandates 5 Political and social views 5 Political culture 5 Protest movements 5 Public opinion 5 less ...