What is the origin of the phrase "circular firing squad"?
I've found many definitions online of the term, which the OED says is "used in reference to a situation in which a group of people are engaged in self-destructive internal conflicts and mutual recriminations," but I haven't been able to find any discussion of its origin.
The idea, though not quite the exact term, appeared in Time magazine in 1972, as quoted in an Alabama newspaper:
After the calamity at the 1968 convention in Chicago, with street fighting upstaging floor fighting, the party decided on a reform movement that would bring more people into the nominating process.
The many primaries with a full platoon of candidates was one result of this reformation, with results best described by a one-liner in Time magazine:
'When reform-minded Democrats are told make up a firing squad they form a circle.'
-- "As O'Brien Sees It." Montgomery Advertiser, April 9, 1972, p4
OED—"September 2020 draft addition" under circular:
circular firing squad n. originally and chiefly U.S. a group of people who are engaged in self-destructive internal conflicts and mutual recriminations; (also) a situation, event, etc., characterized by this kind of behaviour.
1973 Let. in Las Vegas (New Mexico) Optic 23 Mar. 2/1 It is imperative that if we do not integrate we must—at the least—synchronize our lives; otherwise we will form a circular firing squad in which members of the squad will kill all that is worthwhile within the circle as well as themselves in the cross-fire.
This letter in the Las Vegas Optic could be the first use in print, or at least close to it in time, given that the writer explains the expression. I haven't found anything earlier in Google Books.
According to Etymonline:
The metaphoric circular firing squad is attested by 1990.
Actually its usage appears to have been in place at least from the ‘80s
From: City Problems The Annual Proceedings of the United States Conference of Mayors - 1983:
You can easily come away with the impression that our national drug policy is being formulated by a circular firing squad ....
From: Savings Institutions, Volume 109. United States League of Savings Institutions, 1988 :
…the private mortgage insurance business has been like a circular firing squad , ” says Maurice R. Greenberg , president and chief executive officer of American ...