IMAGE Martin Luther King, Jr. Martin Luther King, Jr. (1929-1968), was an American Nobel Laureate, Baptist minister, and African American civil rights activist. He is one of the most significant leaders in U.S. history and in the modern history of non-violence, and was assassinated on April 4, 1968, at 6:01pm, on the balcony of the Lorraine Motel in Memphis, Tennessee.