Causes History 1,451 Politics and government 621 Foreign relations 254 World War, 1914-1918 218 World War, 1939-1945 208 Colonies 195 more ... Slavery 104 War 87 Holocaust, Jewish (1939-1945) 84 Influence 83 Death 80 Political aspects 77 Diplomatic history 66 Mortality 55 Iraq War, 2003-2011 49 Ethnic relations 47 Social aspects 44 Social conditions 43 Historiography 42 World politics 41 Antisemitism 40 Administration 39 Secession 39 Antislavery movements 38 Jews 38 Relations 34 Nationalism 32 Economic aspects 31 Commerce 29 less ...