In 1985, in a seminal paper for the Bulletin of Atomic Scientists entitled ‘Leaving the bomb project’ (Appendix 1), Rotblat declared that working on the Manhattan Project had been a traumatic experience, and one which endured throughout his future life. It is not often given, and certainly not to anyone, to participate in the birth of a new era, he observes.

Martin Underwood, Joseph Rotblat: a man of conscience in the nuclear age, Brighton [England] ; Portland, Or, 2009, p. 29