It took until the late 1950's and 1960's before civil rights movement began. It had always been wrong that the discrimination was allowed, but the men who came home from WW 2 were less likely to put up with discrimination. They had fought the war to preserve democracy and discrimination is not giving civil rights to them. The political climate after the war was ready for a movement in civil rights and many of the people involved were young people with idealism of youth.