The figure who became famous for their stand against military operations and social injustice is Martin Luther King Jr.. He was a prominent leader during the Civil Rights Movement, advocating for peace, equality, and justice through nonviolent resistance. King's efforts highlighted issues of race and morality, garnering national and international attention. He spoke against the Vietnam War, linking themes of social justice and war. King's impactful speeches and writings, particularly the famous "I Have a Dream" speech, continue to inspire movements advocating for equality and justice today.