Economic aspects Defenses -- 4 Emigration and immigration -- 4 National security -- 3 Economic aspects -- 2 Aliens, Illegal -- 1 Cities and towns -- 1 more ... Creative ability -- 1 Disarmament -- 1 Economic conditions 1 Economic convention -- 1 Immigrants -- 1 Intellectual capital -- 1 Military industrial complex -- 1 Military weapons 1 Municipal finance -- 1 Municipal services -- 1 Politics and government -- 1 Post-Cold War 1 Technological innovations -- 1 less ...