Eric S. Raymond is a programmer, author, and open-source advocate best known for cathedral-and-bazaar-raymond (1999), an influential analysis of open-source development methodology contrasting centralized ("cathedral") and decentralized ("bazaar") development models.
Raymond co-founded the open-source-initiative in 1998 with bruce-perens, deliberately reframing stallman's free-software-definition in pragmatic, business-friendly terms. The "open source" label was intended to make the case to corporations without invoking Stallman's ethical framework around the four-freedoms.
This reframing is the central fault line documented in software-freedom-vs-open-source and stallman-vs-open-source-philosophical-core. Stallman responded with why-open-source-misses-the-point, arguing that the term "open source" obscures the fundamental ethical issue of software freedom.
Raymond's hacker-ethic-mit background overlapped with Stallman's, but his libertarian politics and pragmatic framing of software development led to divergent conclusions. His influence helped bring major corporations into Linux and open-source development — an outcome Stallman viewed with ambivalence, since it often came at the cost of the libre-vs-gratis distinction.
His work is documented in revolution-os-documentary and analyzed in relation to Stallman's philosophy in free-as-in-freedom-williams and rebel-code-moody.