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I’m no expert, but didn’t Carl Hewitt’s work on Actors (1973) predate smalltalk by seven years or so? Or was there smalltalk before smalltalk-80?

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Smalltalk started in 1969 or so with first release inside Xerox Parc was in 1972 (Smalltalk-72). See early history of smalltalk : http://wiki.c2.com/?EarlyHistoryOfSmalltalk

See Carl Hewitt's retrospective on Actors which he attributes inspiration to Smalltalk, simula and lisp here: https://arxiv.org/vc/arxiv/papers/1008/1008.1459v8.pdf

Yes, exactly; also, there's an acknowledgement of the influence of "SMALL TALK" at the end of Hewitt, Bishop & Steiger's original 1973 IJCAI paper as it appeared in print (https://eighty-twenty.org/2016/10/12/hewitt-bishop-steiger-i...).

Actors, Smalltalk, Monitors and CSP all co-evolved during the 1970s, with many of the principals visiting each other and exchanging ideas. Retrospectives like Brinch Hansen's (https://dl.acm.org/citation.cfm?id=155361) spell out some of the lines of influence.

Thanks, TIL

Smalltalk-71 perhaps?

http://worrydream.com/EarlyHistoryOfSmalltalk/

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