Daniel Berrigan is noted for his influential role in the anti-nuclear movement during the Cold War. A Roman Catholic priest and social activist, Berrigan gained prominence for his vocal opposition to the Vietnam War and nuclear weaponry. He participated in nonviolent protests, advocating for peace and justice, often facing legal consequences for his actions. His writings and activism emphasized moral responsibility in the face of war and injustice, making him a significant figure in the peace movement. Berrigan's legacy lies in his commitment to nonviolence and his calls for a more just and peaceful world.