Sidney Farber (1903-1973) is an American pediatric pathologist who is also known as the father of modern chemotherapy. He pioneered the use of folic acid antagonists as a means of treating leukemia which was previously viewed as a death sentence. Farber’s discovery paved way for other chemical compounds to be also used to treat other types of malignancies. He also spearheaded fundraising and research on cancer advocacy. He is acknowledged in founding the Jimmy Fund which benefits the Dana-Farber Institute, which is now a world-leader in both pediatric and adult cancer treatment and research.