In the short term a big disaster can bring the community together. But I suppose once people realized the lights weren't coming back on and the tap wasn't going to start flowing again the darker side of human nature may come out. I've said it before and I'll repeat it here once more- I don't think it's possible to really be fully prepared for an EOTWAWKI situation, and maybe not even desirable. Life is complicated and messy somethings and not always easy but it's still a great gift. I love life, but I love it as part of the civilization I'm a part of. While I enjoy getting out of civilized world and into the wilderness I do it with the expectation that civilization will be waiting for me when I return. Absent that I'm just an animal. Animal life still has value but it's probably not enough for someone used to being human.