Question: When was the movement took place which spread beyond the United States through the writings of Steve Biko in South Africa?

Context articles: B. J. Vorster
Cry Freedom
Have You Heard from Johannesburg?
Black Consciousness Movement
Steve Biko Foundation
Aubrey Mokoape
Hlumelo Biko
Black is beautiful
Internal resistance to apartheid
Bennie Khoapa

Balthazar Johannes Vorster (] ; 13 December 1915 – 10 September 1983), better known as John Vorster, served as the Prime Minister of South Africa from 1966 to 1978 and as the fourth State President of South Africa from 1978 to 1979.
 Vorster was known for his staunch adherence to apartheid, overseeing (as Minister of Justice) the Rivonia Trial in which Nelson Mandela was sentenced to life imprisonment for , and (as Prime Minister) the Terrorism Act, the complete abolition of non-white political representation, the Soweto Riots and the Steve Biko crisis.
 He conducted a more pragmatic foreign policy than his predecessors in an effort to improve relations between the white minority government and South Africa's neighbours, particularly after the break-up of the Portuguese colonial empire.
 Shortly after the Internal Settlement in Rhodesia, in which he was instrumental, he was implicated in the Muldergate Scandal and resigned the premiership in favour of the ceremonial presidency, which he was forced to give up as well eight months later.
Cry Freedom is a 1987 South African epic drama film directed by Richard Attenborough, set in late-1970s apartheid era South Africa.
 The screenplay was written by John Briley based on a pair of books by journalist Donald Woods.
 The film centres on the real-life events involving black activist Steve Biko and his friend Donald Woods, who initially finds him destructive, and attempts to understand his way of life.
 Denzel Washington stars as Biko, while actor Kevin Kline portrays Woods.
 "Cry Freedom" delves into the ideas of discrimination, political corruption, and the repercussions of violence.
Have You Heard from Johannesburg is a series of seven documentary films, with a total runtime of 8.5 hours, covering the 45-year struggle of the global anti-apartheid movement against South Africa's apartheid system and its international supporters who considered them an ally in the Cold War.
 The combined films have an epic scope, spanning most of the globe over half a century.
 Beginning with the very first session of the United Nations, and ending in 1990 – when, after 27 years in prison, Nelson Mandela, the best known leader of the African National Congress toured the world, a free man.
 Produced and directed by Connie Field, it includes other events such as the Sharpeville massacre, the Soweto uprising, the murder of Steve Biko, and covers the role of some people less well-known outside South Africa than Nelson Mandela, such as African National Congress leader Oliver Tambo.
 The title comes from the lyrics of the Gil Scott-Heron song “Johannesburg”.
The Black Consciousness Movement (BCM) was a grassroots anti-Apartheid activist movement that emerged in South Africa in the mid-1960s out of the political vacuum created by the jailing and banning of the African National Congress and Pan Africanist Congress leadership after the Sharpeville Massacre in 1960.
 The BCM represented a social movement for political consciousness.
Established in 1998, The Steve Biko Foundation (SBF) is a community development organisation in South Africa.
 The organisation is inspired by the late anti-apartheid activist Steve Biko (1946–1977).
Dr. Maitshwe Nchuape Aubrey Mokoape (born 6 September 1944) was also known as a political anti-apartheid activist and a former leader of the Pan-African Congress and Black Consciousness Movement in South Africa.
 He was first arrested and detained at the age of 15.
He studied and worked alongside political anti-apartheid activist Steve Biko.
 who was a founder and was elected president of the Black Consciousness Movement.
 In post apartheid South Africa he is now known as a physician and a soldier in the struggle for freedom.
Hlumelo Biko (born January 1978, in King William's Town, Eastern Cape, South Africa) is a South African businessman and investment banker.
 He is the son of Steve Biko and Mamphela Ramphele.
Black is beautiful is a cultural movement that was started in the United States of America in the 1960s by African Americans.
 It later spread beyond the United States, most prominently in the writings of the Black Consciousness Movement of Steve Biko in South Africa.
Internal resistance to "apartheid" in South Africa originated from several independent sectors of society and alternatively took the form of social movements, passive resistance, or guerrilla warfare.
 Mass action against the ruling National Party government, coupled with South Africa's growing international isolation and economic sanctions, were instrumental factors in ending racial segregation and discrimination.
 Both black and white South African activists such as Steve Biko, Desmond Tutu, Nelson Mandela, Harry Schwarz, and Joe Slovo were involved with various anti-apartheid causes.
 By the 1980s, there was continuous interplay between violent and non-violent action, and this interplay was a notable feature of resistance against apartheid from 1983 until South Africa's first multiracial elections under a universal franchise in 1994.
Bennie Khoapa was a social worker in South Africa during the 1960s and 1970s involved in the resistance to apartheid.
 He worked for the Young Men's Christian Association (YMCA), and was supportive of the young activists of the time, especially the young Steve Biko.
 Ultimately Biko and Khoapa founded the Black Consciousness Movement (BCM).
 In the movement, Khoapa was able to use his experience and connections to garner the support of various Christian organizations, and lend the BCM crucial credibility in its formative months.
 Khoapa was among those banned by the South African government due to their actions in the anti-apartheid movement.