Emigration and immigration 28 Politics and government 17 Foreign relations 15 Government policy 15 History 7 Security, International 7 Economic conditions 6 Immigrants 6 International cooperation 6 Multiculturalism 6 National security 6 Democracy 5 Foreign Relations 5 Foreign economic relations 5 Globalization 5 Relations 5 Political aspects 4 Political parties 4 Presidents 4 Commerce 3 Cultural pluralism 3 Economic aspects 3 Economic policy 3 Human rights 3 Military policy 3 Political participation 3 Social conditions 3 Strategic aspects 3 Water-supply 3 Agriculture and state 2