This academic article touches on connections to African-American communities and remnants of the Abolitionist movement. Notes a boycott of a segregated Chicago hotel in the early 1900s. Dominic Candeloro, "The Single Tax Movement and Progressivism, 1880-1920" The American Journal of Economics and Sociology , Apr., 1979, Vol. 38, No. 2 (Apr., 1979), pp. 113-127
