… In short, we repudiated all versions of the doctrine of original sin, of there being insane and irrational springs of wickedness in most men. We were not aware that civilisation was a thin and precarious crust erected by the personality and the will of a very few, and only maintained by rules and conventions skilfully put across and guilefully preserved. We had no respect for traditional wisdom or the restraints of custom. We lacked reverence, as Lawrence observed and as Ludwig with justice also used to say— for everything and everyone. It did not occur to us to respect the extraordinary accomplishment of our predecessors in the ordering of life (as it now seems to me to have been) or the elaborate framework which they had devised to protect this order. Plato said in his Laws that one of the best of a set of good laws would be a law forbidding any young man to enquire which of them are right or wrong, though an old man remarking any defect in the laws might communicate this observation to a ruler or to an equal in years when no young man was present. — John Maynard Keynes, in The Collected Writings Of John Maynard Keynes, Volume 10: Essays In Biography, Part VI – Two Memoirs, Chapter 39: My Early Beliefs, pages 447-448:
Cambridge University Press link. Quote h/t Ann Pettifor.