I'm not a survivalist, but the prospect of social unrest if the economy goes bad or terrorists disrupt our power grid or an EMP gets set off over the USA, uncontrolled plague like Ebola.....etc, could be some very bad times in short order with people not behaving in a very civilized manner. Would seem prudent to be well armed and have enough extra in ammo and guns to provide basic protection for one's family as well as to secure some element of a food supply. As a rule, I doubt that many of us would do a good job of surviving in such an environment - especially in large urban settings. It does give one pause to ponder such a scenario.