Robert Oppenheimer, a renowned physicist and the director of the Manhattan Project, is often referred to by a variety of synonyms. Some of the most common include "the father of the atomic bomb," "the architect of the atomic bomb," and "the creator of the atomic bomb." Other synonyms for Oppenheimer include "the father of modern physics," "the founding father of nuclear weapons," and "the godfather of the atomic age." Despite his pivotal role in the development of nuclear weapons, Oppenheimer struggled with the moral implications of his work and became an advocate for arms control later in life.