(p. 180) The truth remains that over the course of the twentieth century, the greatest gains in the battle against cancer came from independent research that was not under any sort of centralized direction and that did not have vast resources at its disposal. As we have seen, such research led to momentous chance discoveries in cancer chemotherapy and a greater understanding of the mechanisms of the disease that have resulted in exciting new therapeutic approaches.
Meyers, Morton A. Happy Accidents: Serendipity in Modern Medical Breakthroughs. New York: Arcade Publishing, 2007.