A completely different resource for world building

[Sirrocco]

Actually, mostly I'd been looking at his look at food basis and weapons. I should have specified, I suppose. The bit about weapons needs to be taken with a grain of salt, but is a decent jumping-off point. My guess is that the bit about food basis is the same, with the advantage that most people don't think about it at all (and so "mostly right" gets a lot better by comparison).