Question: Gerald Williams' work has been influential within what Time magazine described as the single most controversial movement in the history of what?

Related documents: [0]  [DOC] The Black Arts Movement, Black Aesthetics Movement or BAM is the artistic outgrowth of the Black Power movement that was prominent in the 1960s and early 1970s. "Time" magazine describes the Black Arts Movement as the "single most controversial movement in the history of African-American literature – possibly in American literature as a whole." The Black Arts Repertory Theatre is a key institution of the Black Arts Movement. [END] 
[1]  [DOC] Gerald Williams (born 1941, Chicago, Illinois) is an American visual artist whose work has been influential within the Black Arts Movement, a transnational aesthetic phenomenon that first manifested in the 1960s and continues to evolve today. Williams was a founding member of AfriCOBRA. His work has been featured in exhibitions at some of the most important museums in the world, including the Tate Modern, the Museum of Contemporary Art, Chicago, the Studio Museum in Harlem, and the Institute of Contemporary Art, Philadelphia. In addition to his influence as a contemporary artist, he has served in the Peace Corps, taught in the public schools systems of Chicago and Washington, D.C., and served as an Arts and Crafts Center Director for the United States Air Force. In 2015, he moved back to his childhood neighborhood of Woodlawn, Chicago, where he currently lives and works. [END]  
Answer: African-American literature
African-American literature