Martin Luther King Jr. symbolized hope, nonviolent resistance, and the quest for equality during the civil rights era. His leadership in the movement advocated for racial justice and civil rights through peaceful protests and powerful oratory, notably in his "I Have a Dream" speech. King’s commitment to social change inspired countless individuals, fostering a sense of unity among diverse communities. His legacy continues to represent the ongoing struggle against racism and injustice, making him an iconic figure in American history who influenced legislation like the Civil Rights Act and Voting Rights Act.