
“Violence,” came the retort, “is the last refuge of the incompetent.”
Variant: Violence is the last refuge of the incompetent.
Source: Part II, The Encyclopedists, section 5; This also appears three times in "Bridle and Saddle" which is titled "The Mayors" within Foundation. It is derived from the famous phrase by Samuel Johnson: "Patriotism is the last refuge of a scoundrel" and from the words of Lady Anne Bellamy in H. Rider Haggard's Dawn, “I do not believe in violence; it is the last resource of fools.” Asimov is usually quoted simply with "Violence is the last refuge of the incompetent."