Emacs is a conscious computer virus with the aim of hollowing Unix out function by function, eventually to overthrow it. It's like a vampire: a shadow of what made it beautiful in life (elisp vs the old lisp machines), sustained mostly by blood (of its new users) and its long-term goal of revenge.
There are three basic types of online participants: "watercooler", "scientific conference", and "debate team". In "watercooler", the participants are having an entertaining conversation and sharing anecdotes. In "scientific conference", the participants are trying to increase knowledge and solve problems. In "debate team", the participants are trying to prove their point is right.
Open Source is a marketing term, coined by ESR because "Free Software" is scary to businesses, much the same way that record labels coined 'New Wave' to make Punk Rock palatable to the record buying public.