It has been estimated 80% of urban population will die within a month of something as simple as a power failure, the human body failing after a month of no food and four days of no water. With longevity of a situation, then all one would have to do was explain how you could still be living when so many would have died, then protect yourself from marauders who see you may have supplies. Sadly no matter what anyone does, this will be the ultimate reality. Aggression has been what keeps the world moving forward. Not much wonder God plans to eliminate the self serving ways of mankind.