You are no doubt thinking of Steve Biko, but he was a leader only of the South African Student Organisation.
The African American leader who believed in the separation of black people and white people was Marcus Garvey. He advocated for the establishment of a separate nation for Black people, promoting the idea of Black nationalism and self-determination. Garvey founded the Universal Negro Improvement Association (UNIA) and emphasized economic independence and pride in African heritage. His views contrasted with those of other civil rights leaders who sought integration and equality within existing societal structures.
After the formation of SASO(South African Student Organisation) by Steve Biko in 1959,the students determination led to the formation of black consciousness in S.A.
They believed that African americans needed to live apart from whites.
Justin Beiber
They believed that African americans needed to live apart from whites.
Marcus Garvey
Elijah Is A nation Of Islam Leader. Elijah Is a Black African American
Jeff Fort
Booker T. Washington
Martin Luther King, Junior, believed in liberal arts education for African Americans. Before this, it was difficult or impossible for black students to get into good liberal arts colleges.
Culture
One of Biko's primary beliefs was that Black, Indian and Coloured students needed an organization of their own. He helped to start the South African Students' Organisation and later the Black Consciousness Movement.