Keywords: Geschichte 1900-2000 ; Einwanderer ; Gesellschaft ; Migration ; Politik ; Schwarze. USA ; African Americans Congresses Politics and government ; African Americans Congresses Social conditions 1975- ; Democracy ; Immigrants Congresses Political activity ; Immigrants Congresses Social conditions ; Ethnische Beziehungen. ; Einwanderungspolitik. ; USA ; United States Congresses Emigration and immigration ; Government policy ; United States Congresses Emigration and immigration ; Social aspects ; United States Politics and government 20th century ; United States Congresses Race relations ; United States Congresses Race relations ; Political aspects ; USA. ; Konferenzschrift 1994 ; Konferenzschrift 1994 ; Konferenzschrift 1994 ; Konferenzschrift 1994 ; Ethnische Beziehungen ; Einwanderungspolitik