What were the controversies of the black arts era?
Sounds as if you need to read up on Langston Hughes and many others who made up what was called the Harlem Renaissance. It's fascinating. You should enjoy it all. Read, read, read.
http://www.google.com/search?rlz=1C1GGGE_enUS379US379&sourceid=chrome&ie=UTF-8&q=langston+hughes
http://www.google.com/search?hl=en&rlz=1C1GGGE_enUS379US379&q=harlem+renaissance&oq=harlem+renai&aq=0&aqi=g10&aql=1&gs_l=serp.1.0.0l10.22002.24232.0.26943.12.9.0.3.3.0.144.940.2j7.9.0.pfwc.1.0.0.vpohInE7HjU