Economic aspects Defenses -- 8 Economic aspects -- 6 Technological innovations -- 5 Emigration and immigration -- 4 Globalization 4 National security -- 4 more ... Social aspects 4 Capitalism -- 3 Foreign economic relations 3 Free trade 3 International economic relations 3 Environmental aspects 2 Environmental policy -- 2 Foreign relations -- 2 Intercultural communication 2 International trade -- 2 Politics and government -- 2 Agriculture -- 1 Aliens, Illegal -- 1 Appropriations and expenditures 1 Armed Forces 1 Armed forces 1 Arms race 1 Business -- 1 Business cycles 1 Business enterprises -- 1 Cities and towns -- 1 Copyright -- 1 Cost control 1 less ...