War is to some people the solution to peace.

We sometimes spend a trillion on a fight over a hundred.

As we all know, as if forever exploiting or attempting to exploit each other were not enough, a group of sane human beings who have just reached the end of a war against a common enemy of theirs will sooner or later start or continue killing and/or fighting against each other.

Making love instead of war is likely to lead to an even bigger population, which is likely to lead to wars.