Growing up, I was always taught by my environmental lawyer father that yes; war is inevitable. He was deeply influenced by overpopulation books like "The population bomb", by Paul Elrich. The predictions in that book did not pan out(I think it said we would've all been dead by now, or at least living in a ghastly, overpopulated world).
My father always taught me that war was a natural population control; that however unpleasant, it acted to reduce population and ease competition for resources.
In adulthood, I think of this a lot. While it might be true that war is a natural control for an unhealthily large population, aren't there other, more logical ways to curb the growth?