In the 1930s, there were six Nobel Prizes awarded: Physics, Chemistry, Physiology or Medicine, Literature, Peace, and Economics. The most common prize was Physiology or Medicine, often awarded to groups of two or three scientists for collaborative work. The least common prizes were Peace and Literature. By the 1930s, the Nobel Prizes typically honored discoveries rather than recent work. The most famous winner was Jane Addams, who was the only woman to win in the 1930s, receiving the Peace Prize for her work promoting peace and women's rights.