Hjalmar Branting
Karl Hjalmar Branting (November 23, 1860-February 24, 1925) was a Prime Minister of Sweden, serving for three separate periods in 1920, 1922-23, and 1924-25.A lifelong socialist, as Prime Minister he brought Sweden into the League of Nations and was personally active as a delegate within it.
He won the Nobel Peace Prize in 1921.