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

Context paragraphs:
Black Arts Movement: 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.

Freeman Brothers: The Freeman Brothers were a Motown duo active 1964-1970, Johnny Mitchell, one of doo wop group The Majestics lead singers, and orchestra leader Gerald Williams.  The duo left Motown after their single "My Baby" (1965) failed to achieve commercial success and continued until the single "Sally Goes Up The Ladder" on Sprout in 1970.

Guillermo Gómez Rivera: Guillermo Gómez Rivera (] ; born 12 September 1936) is a Spanish Filipino multilingual author, historian, educator and linguistic scholar whose lifelong work has been devoted to the often controversial movement to preserve Spanish culture as an important element of the Filipino identity.

Gill Industries: Gill Industries is an American global supplier that works mainly in welding and assembly, headquartered in Grand Rapids, Michigan with offices in Trenton, Georgia, Richmond, KY, and global offices in Mexico, Europe and Asia.  The supplying company works to assemble, develop and supply to clients in the automotive, office and wireless power markets.  It was initially named "Gill & Williams Tooling" as a local tool and die shop when it was created in 1964 by John Gill and Gerald Williams.  It expanded into welding and assembly in the 1980s, and has been a supplier for large companies like BMW, Volkswagen, Club Car, Herman Miller and Ford Motors for years.  Gill Industries also owns Gill Electronics.  Gill Industries is owned by Gill Holding Company, Inc.

Gerald Williams (rugby league): Gerald Williams is a South African rugby league player who represented his country in the 1995 World Cup.

Gerald Williams (artist): 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.

Carmarthen Grammar School: Carmarthen Grammar School was a selective secondary school in Carmarthen, Carmarthenshire: among its ex pupils were the educalionalist, Griffith Jones; the early Methodist leader and Bible publisher, Peter Williams; the senior Admiralty civil servant, Sir Walter St David Jenkins; the clergyman, James Rice Buckley; the rugby player, Ray Gravell; and the tennis commentator and journalist Gerald Williams.

Gerald Williams (American football): Gerald Williams (born September 8, 1963) is a former American football defensive lineman in the National Football League for the Pittsburgh Steelers, the Carolina Panthers, and the Green Bay Packers.  He played college football at Auburn University, where he was named to the 1986 All-SEC team, and was drafted in the second round of the 1986 NFL Draft.  He also spent several years as a college and pro scout for the Panthers.  Williams spent the 2009 season as tight ends coach for the Division II Catawba Indians located in Salisbury, NC.

Gerald Williams (tennis commentator): Gerald Williams (24 June 1929 – 21 January 2016) was a British tennis commentator and journalist.  Williams wrote for the "Croydon Advertiser" and the "Daily Mail".  Williams presented the nightly round-up of Wimbledon coverage on BBC television for ten years with Des Lynam.

Shepherding Movement: The Shepherding Movement (sometimes called the "Discipleship Movement") was an influential and controversial movement within some British, Australian and American charismatic churches.  It emerged in the 1970s and early 1980s.  The doctrine of the movement emphasized the "one another" passages of the New Testament, and the mentoring relationship described in the Second Epistle to Timothy.

Supporting paragraphs: Gerald Williams (artist) Black Arts Movement
Answer: African-American literature