The historical figure known for the quote "I have a dream" is Martin Luther King Jr. This powerful phrase is from his iconic speech delivered during the 1963 March on Washington for Jobs and Freedom, where he sought to highlight the struggles against racial injustice and advocate for civil rights. His dream emphasized the hope for a future where individuals would be judged by their character rather than their race. King’s eloquence inspired countless people and remains a cornerstone of the American civil rights movement, symbolizing the fight for equality, justice, and unity among diverse populations.