Foreign relations -- 46 Foreign economic relations -- 18 National security -- 11 Commerce -- 10 Military relations -- 9 Relations -- 9 History -- 8 more ... Politics and government -- 8 Politics and government 7 Biography -- 6 Economic conditions -- 6 World War, 1939-1945 -- 6 Emigration and immigration 5 Government policy -- 5 Economic conditions 4 Marine resources -- 4 Military policy 4 Social life and customs 4 World War,1939-1945 -- 4 Autonomy and independence movements 3 Congresses -- 3 History 3 Immigrants -- 3 Sea-power -- 3 Social conditions 3 Strategic aspects 3 Arbitration, Industrial -- 2 Armed Forces -- 2 Biography 2 Brain drain -- 2 less ...