World politics History 15 Political aspects 15 Terrorism 10 Foreign relations 8 Petroleum industry and trade 8 International relations 7 more ... Economic history 5 September 11 Terrorist Attacks, 2001 5 World War, 1914-1918 5 Causes 4 Communism 4 Military aspects 4 Relations 4 Socialism 4 Economic conditions 3 Economic policy 3 Energy policy 3 Foreign economic relations 3 Globalization 3 Government policy 3 International cooperation 3 International economic relations 3 Political violence 3 Social aspects 3 War on Terrorism, 2001-2009 3 World War, 1939-1945 3 Capitalism 2 Depressions 2 Feminist theory 2 less ...