TIME shows John Lewis at age 23, in May 1963, as chairman of the Student Nonviolent Coordinating Committee (SNCC), in Clarksdale, Miss.
Why it matters:Born in Alabama to the son of sharecroppers, Lewis went on to dedicate his life toward fighting the racial injustices that labeled him as a second-class citizen. He became the chair of the SNCC in 1963 and went on to become the youngest person to speak at the March on Washington that August.