The famous civil rights leader known for his slogan "Black Power" is Stokely Carmichael. Active in the 1960s, Carmichael was a prominent figure in the Student Nonviolent Coordinating Committee (SNCC) and later became its chairman. He initially advocated nonviolent protest but later shifted towards emphasizing Black self-determination and empowerment. The "Black Power" slogan galvanized a movement that sought racial dignity, economic and political power for African Americans, and critiqued the mainstream civil rights movement's nonviolent approach. His views contributed to broader discussions about race, identity, and inequality in America.