The famous civil rights leader known for organizing the March on Washington is Martin Luther King Jr. On August 28, 1963, he delivered his iconic “I Have a Dream” speech to advocate for racial equality and justice. The march aimed to mobilize support for civil rights legislation and was one of the largest rallies for human rights in U.S. history, drawing over 250,000 participants. King’s leadership and vision greatly influenced the Civil Rights Movement, inspiring widespread activism and culminating in significant legislative achievements like the Civil Rights Act of 1964.