Politics and government -- 11 Economic conditions -- 6 World War, 1939-1945 -- 5 Diplomatic history 4 History -- 3 Causes 2 Foreign relations -- 2 more ... Influence 2 World War, 1914-1918 -- 2 Biography -- 1 Capitalism 1 Civilization -- 1 Colonies -- 1 Constitutional history -- 1 Economic conditions 1 Economic development 1 Economic history -- 1 Economic policy 1 Families 1 Fathers and sons 1 Federal government -- 1 History 1 National characteristics, American 1 Nationalism -- 1 Presidents -- 1 Protectionism -- 1 Reconstruction (1914-1939) 1 Social classes -- 1 Social conditions -- 1 Social life and customs -- 1 less ...