“A military hierarchy automatically places a premium on conservative behavior and dull conformance with precedent; it tends to penalize original and imaginative thinking.”

Afterword to The Dud Avocado (2006)
Context: I look back in wonder at The Dud Avocado: in wonder at its initial reception and at the many times it’s been reissued — for years it was even republished alongside of every new book of mine that came out. I look back in wonder at the 1950s. The dull conformity of those years as they are generally imagined is something I don’t recognize. I look back in wonder at London in particular, where whole areas destroyed during the Second World War still lay in rubble. But London was in the midst of a renaissance for artists. In literature and playwriting the Angry Young Men were making their splash and new young actors like Richard Burton, Peter O Toole, Albert Finney, and Peter Finch were coming into their own. London was an orderly place where it was safe to take risks. Optimism was the rule of the day and I was there.

Source: Freedom, Loyalty, Dissent (1954), p. 15

Source: The God Delusion

Source: The Peter Principle (1969), p. 25: Statement of the Peter Principle

Buy Jupiter and Other Stories (1975), p. 82
General sources

War and Change in World Politics (1981)

RFC 791 http://www.ietf.org/rfc/rfc0791.txt, Internet Protocol (September 1981)
Often shortened to Be liberal in what you accept, and conservative in what you send.

2010s, Bullwhip Feudalism (2018)