King, Martin Luther, Jr. (1929-1968), American clergyman and Nobel Prize winner, one of the principal leaders of the American civil rights movement and a prominent advocate of nonviolent protest. King’s challenges to segregation and racial discrimination in the 1950s and 1960s helped convince many white Americans to support the cause of civil rights in the United States. After his assassination in 1968, King became a symbol of protest in the struggle for racial justice. Martin Luther King, Jr., was born in Atlanta, Georgia, the eldest so ....