No matter what corner of the multiverse Desmond went to, war has always been cruel; this will not change; it was a matter of nature, an immutable truth. Perhaps more advanced civilizations with different cultures and values will resolve their conflicts by other means whenever possible. Still, Desmond doubted things would be much different once things had escalated into warfare.
However, the invariability of war did not bring any relief to someone like Desmond; on the contrary, a part of him felt pretty depressed about it. It was natural; even someone as keen on combat as Desmond would sometimes dream of a peaceful world in which to raise a family.