Martin Luther King Jr. is the historical figure famous for his iconic "I Have a Dream" speech. Delivered during the March on Washington for Jobs and Freedom on August 28, 1963, the speech envisioned a future where people would be judged by their character rather than the color of their skin. King’s powerful oratory and moral conviction spurred the civil rights movement, advocating for racial equality and justice in America. The speech is considered a defining moment in the struggle against racial discrimination and continues to inspire movements for social justice around the world.