Jacques Monod was a French biologist, author, and winner of a Nobel Prize in Physiology or Medicine in 1965, sharing it with two other scientists, for discoveries concerning genetic control of enzyme and virus synthesis. He is widely regarded as one of the founders of molecular biology. 
In the book Has Science Found God? - The Latest Results in the Search for Purpose in the Universe by Victor Stenger (pp. 77), Monod is quoted from 1970: "The ancient covenant is in pieces; man at last knows that he is alone in the universe’s unfeeling immensity, out of which he emerged only by chance. His destiny is nowhere spelled out, nor is his duty. The kingdom above or the darkness below: it is for him to choose."