I stepped off the subway today basking in the glow of Martin Luther King, Jr.'s American Dream speech. Among the most memorable lines from that speech are "The arc of the moral universe is long, but it bends toward justice,' and "Free at last, free at last, thank God Almighty, I am free at last," which would late be inscribed on Dr. King's tomb. The thirty-minute speech is a wide-ranging discursion on the meaning of the rights of humanity, embracing meditations on the words of Jefferson, Plato, Aristotle, Donne, and Jesus, and calling for justice in all parts of the world from Jackson, Mississippi to Calcutta, India. King outlines his strategy of nonviolence and calls for love of our oppressors in the highest sense. Perhaps surprisingly, his greatest applause line was the statement that black supremacy was as much to be feared as white supremacy. He is unequivocal in his call for unity, humanity, and brotherhood even as he is clear eyed about the reality of beatings, jail, and lynching. Those who doubt that this was the most powerful voice of the twentieth century need to listen to this speech.