Final answer:
Jane Addams was the first U.S. woman to win the Nobel Peace Prize in 1931 due to her pacifism and leadership in the women's suffrage movement, despite facing criticism during her lifetime.
Step-by-step explanation:
The first woman from the U.S. to win the Nobel Peace Prize was Jane Addams in 1931. Addams was known for her work as a pacifist and her leadership in the women's suffrage movement. Her unwavering commitment to peace, even in the face of criticism for opposing the U.S. entry into World War I, earned her recognition from the international community. Despite the criticism and threats she faced during her lifetime, Jane Addams's dedication to pioneering social work and peace advocacy eventually led to her being honoured with the prestigious award.
Jane Addams founded the Woman's Peace Party in 1915 and played a crucial role in the International Congress of Women, which called for an immediate end to World War I. Her relentless efforts in the settlement house movement and her integral participation in international peace efforts made her a significant figure in history and an inspiration for future generations seeking peaceful resolutions to conflicts.