During Hurricane Katrina, most of New Orleans left the city, because they were forced to. Many of those people had never been outside of New Orleans, and when they left, they went to Houston or another large city where they could be taken care of with our tax dollars. Now, everyone is talking about people fleeing the cities to the countryside. While I understand this assumption, I cannot find enough recent (past 100 years) history to justify this in our country. Most people will need to rely on a community to survive, it's doubtful all the infrastructure will disappear (if it does, most of the cities will be gone, with everyon in them anyhow), so I think most people who live in the cities will stay there, because they will be even more poorly prepared to live in the country/outdoors. To live outside you need certain learned skill sets, most urbanites don't have these, and would starve without a 7/11 or fast food, they wouldn't make it to the country side, let alone live there successfully. Using New Orleans as an example, without infrastructure and significant government aid, most of those people who evacuated would have died. I just can't see the national parks and the country being overrum with city dwellers, it just doesn't make sense and does not really have any SIGNIFICANT historical evidence for such an occasion. Were they to come to the country anyhow, most of the good ole boys in my area would end up using them for fertilizer. City dwellers are unprepared for life outside the city and most would not survive once they stopped recieving aid. Most would probably kill each other before they left the city and even made it past the suburbs. So for survival I would think hunting rifle and those sorts of firearms would make more sense in the long run. A few weapons for self-defense are fine, that's what I have, but the majority of mine are for hunting (I live outside a major city, on land in "rural" community. After any initial shock to society it will eventually begin to rebuild itself. If you guys think I'm way off base with this, okay, I may be, but I just can't see a total failure of society, short of nuclear war or the plague, and even then communities, especially in rural areas will still exist, and it city folk won't flood the forest and farmlands. IMHO.