Imperialism Colonies 29 History 22 Foreign relations 15 Politics and government 12 Capitalism 11 Socialism 9 World politics 9 Economic conditions 8 Economic history 8 International economic relations 6 Communism 4 Foreign economic relations 4 Nationalism 4 Territorial expansion 4 Commercial policy 3 Competition, International 3 Economic policy 3 History, Modern 3 Imperial federation 3 Philosophy 3 Saving and investment 3 Social classes 3 World War, 1914-1918 3 Administration 2 Cities and towns 2 Commerce 2 Economic aspects 2 History and criticism 2 Political and social views 2