Susan

The optimal word here is MATURITY. If we compare humans to apes or our own human children, the most aggressive periods in life are early childhood, teenage and early adulthood. War is only inevitable if the Human Race as a whole does not mature. It is based on the level of maturity of the Human Race, which is a matter or evolutionary maturity. We can educate people, but, not everyone matures at the same time, although it could happen, eventually.