Wars, not just individual or tribal violence, requires heirarical societies able to support a significant warrior class. This, in turn, requires stores of food significantly in excess of the needs of the population. Today, those food stores are only practical to acquire through agricultural. If agricultural were no longer available then wars, as we know them, would likely become impractical. http://www.shtfplan.com/headline-news/the-next-generation-of-warfare-genetic...