C. West Churchman was influential not only amongst his students (e.g. Russell Ackoff, Ian Mitroff, Werner Ulrich) but also amongst his peers (Stafford Beer).
From the archives …
“In Celebration of C. West Churchman’s 80 Years” | Interfaces | Vol. 24, No. 4, July-August 1994 at https://www.jstor.org/stable/i25061899 .
At INFORMS, the first chapter at https://pubsonline.informs.org/toc/inte/24/4 is free, and then the rest is available to members.