Who was the first American to win the Nobel Prize?

Theodore Roosevelt, President of the USA, received the Peace Prize for having negotiated peace in the Russo-Japanese war in 1904-5. He also resolved a dispute with Mexico by resorting to arbitration as recommended by the peace movement.

Roosevelt was the first statesman to be awarded the Peace Prize, and for the first time the award was controversial. The Norwegian Left argued that Roosevelt was a "military mad" imperialist who completed the American conquest of the Philippines. Swedish newspapers wrote that Alfred Nobel was turning in his grave, and that Norway awarded the Peace Prize to Roosevelt in order to win powerful friends after the dramatic dissolution of the union with Sweden the previous year.