b) Theodore Roosevelt

Theodore Roosevelt, the 26th President of the United States, was awarded the Nobel Peace Prize in 1906, becoming the first American to receive this honor. Roosevelt was recognized for his instrumental role in negotiating the end of the Russo-Japanese War with the Treaty of Portsmouth. His successful mediation efforts not only ended the conflict but also marked a new era of American diplomacy on the world stage. Roosevelt’s receipt of the Nobel Peace Prize reflected his commitment to peace and his innovative approach to international diplomacy, further solidifying his legacy as a significant figure in global affairs.