Martin Luther King Jr. was a prominent advocate for civil rights through acts of civil disobedience and sit-ins during the 1960s. As a leader of the American civil rights movement, he championed nonviolent protest to challenge racial injustice and segregation. His speeches and actions, notably the Montgomery Bus Boycott and the March on Washington, highlighted issues of equality and civil rights, inspiring countless individuals to join the movement. King’s philosophy of nonviolence and his powerful messages significantly shaped the struggle for racial justice, leaving an enduring legacy in American history.