Social conditions History 19 Politics and government 7 Relations 5 Berlin Wall, Berlin, Germany, 1961-1989 3 Foreign relations 3 International relations 3 more ... Political aspects 3 Protest movements 3 Race relations 3 Social aspects 3 Americans 2 Antinuclear movement 2 Architecture 2 Architecture and society 2 Armed Forces 2 Arms race 2 City planning 2 Civil-military relations 2 Civilization 2 Cold War 2 Ethnic relations 2 Foreign service 2 Group identity 2 Holocaust, Jewish (1939-1945) 2 Human factors 2 Nuclear disarmament 2 Nuclear weapons 2 Peace movements 2 Psychological aspects 2 less ...