What part of their comment seems unrelated?
In the end those wars are just a power and influence games for the ruling class.
Sometimes I think if the world would be better if instead of ~200 counties we had only ~10? But how to unite counties? People can agree to unite, but no one from the ruling class will agree to lose the power. So we are back to the war theme, because the war is the easiest way to unite pieces of land, but how to unite people? No idea, but... but we can find a new common enemy!