In an urban setting, I would say knowing your rights and responsabilities as a citizen (or subject, if you are on of our British friends) is at least as important as knowing how to make shelter in a wilderness setting.

I always get kicked out of the jury pool. *pouts* I get board waiting during selection, so I take a little pocket sized book that has the Consititution, the Federalist Papers, et al, with the Constitution right on the cover. For some reason, they don't like me.