In the wake of all the Gary Gygax tributes, it has occurred to me that many people have missed the man's ultimate legacy. Dungeons and Dragons took an antisocial demographic, the geek, and got them together for a social activity. Yes, most game groups were closed circles, but at least we were all talking. We laughed, we faced challenged in a team-building way, and we spent a lot of time interacting with each other.
This, really, is Gary Gygax's legacy. A generation of geeks and nerds who have a modicum of social ability, who can get together be social and polite, and gave us a common culture: role-playing games.
That's right. Gary Gygax united the geeks.