Sanders later described his time in Chicago as "the major period of intellectual ferment in my life. " While there, he joined the Young People's Socialist League (the youth affiliate of the Socialist Party of America) and was active in the civil rights movement as a student for the Congress of Racial Equality (CORE) and the Student Nonviolent Coordinating Committee (SNCC). Under his chairmanship, the university chapter of CORE merged with the university chapter of the SNCC. In January 1962, he went to a rally at the University of Chicago administration building to protest university president George Wells Beadle's segregated campus housing policy. At the protest, Sanders said, "We feel it is an intolerable situation when Negro and white students of the university cannot live together in university-owned apartments". He and 32 other students then entered the building and camped outside the president's office. After weeks of sit-ins, Beadle and the university formed a commission to investigate discrimination. After further protests, the University of Chicago ended racial segregation in private university housing in the summer of 1963.