Peace as a condition of a group, whether company or nation, requires the eternal alertness and agility to create new answers in the flow of changing times. It requires management skills, PR skills, deft administration, good justice, smart financial insight and good economics.
It is unfortunate that our Administration lacks so many of these. Even their PR is constantly being compromised by its incessant dupicity.
But given some degree of these abilities, war is not necessary. If they are used to head situations off before they explode, it will be unusual.
Where it isn't, you can find glaring failures in the integrity and ability of leaders to maintain that alertness and those skills.