Yeah, i'm pretty sure observational studies after natural disasters (those who followed up Katerina especially) showed that it wasn't really the case. Yes, you have looters everywhere (Even in Japan), but most people help their neighbours (or even strangers if those looks non-threatening). Only when you have a central authority figure present and a lot of people you see riot and aggression, hence the reason why in most countries that need help, aid distribution is as decentralized as possible nowadays (centralized distribution is a _really_ good way of having people killed in the mass anyway).