History 30 Government policy 11 Social aspects 11 Immigrants 10 Political aspects 10 Foreign relations 7 Nationalism 6 もっと見る ... Politics and government 6 Social conditions 6 Terrorism 6 City planning 5 Economic aspects 5 Emigration and immigration 5 Research 5 Rural development 5 Urban renewal 5 Colonies 4 Cultural assimilation 4 Economic conditions 4 Ethnic relations 4 Urbanization 4 World War, 1939-1945 4 Atrocities 3 Competition, International 3 Economic integration 3 Employment 3 Historical geography 3 Holocaust, Jewish (1939-1945) 3 Imperialism 3 Management 3 隠す ...