Martin Luther King Jr. was an African American Baptist minister, activist, and Nobel Peace Prize laureate who became the most visible spokesperson and leader in the American civil rights movement from 1955 until his assassination in 1968. King advanced civil rights through nonviolence and civil disobedience, inspired by his Christian beliefs and the nonviolent activism of Mahatma Gandhi. He was the son of early civil rights activist Martin Luther King Sr. King participated in and led marches for blacks’ right to vote, desegregation, labor rights, and other basic civil rights. King helped organize the 1963 March on Washington, where he delivered his famous “I Have a Dream” speech on the steps...