Jane Addams (1860-1935) was a pioneer American social activist, author, public philosopher, and suffragist. In 1931, she became the first American woman to be awarded the Nobel Peace Prize. An icon of the Progressive Era, Addams was the founder of the social work profession in the United States.

"What after all, has maintained the human race on this old globe despite all the calamities of nature and all the tragic failings of mankind, if not faith in new possibilities, and courage to advocate them."

from Peace and Bread in Time of War (1922), Chapter 7 : Personal Reactions During War

(h/t Wikiquote)