Martin Luther King Jr. is the historical figure known for the "I Have a Dream" speech. Delivered during the 1963 March on Washington for Jobs and Freedom, King's speech articulated his vision for a racially integrated and harmonious America. It emphasized the importance of civil rights, equality, and the need to end racial injustice. The phrase "I have a dream" resonates powerfully in the context of the struggle for civil rights and has become one of the most iconic phrases in American history. King's legacy continues to inspire movements for social justice around the world.