If only....Also known as "Closet Detente"

I often wonder, what if people with evil in their hearts could redirect their passion towards good. How many problems could be solved? How many people could be helped? There are so many natural disasters and human tragedies already in the world. Do we really have to add more that are man-made?
That leads me to my husband's closet...
We just adopted a new kitten - currently named Kitty unless someone has a better name. Kitty joins Cocoa the dog and Pizza the cat (we have a food name theme going). The integration has been tenuous. Cocoa has come to tolerate the kitty pretty well though she doesn't understand why Kitty can't play tug of war with her. Pizza has been a lot less welcoming. Have you ever heard a cat growl? It's spooky! We've been on pins and needles waiting for these cats to either maul each other or become best buds. It seems Kitty is doing her share trying to get Pizza to engage. Pizza, a mature male, is keeping his distance. Until today.
My husband's walk-in closet has been a favorite hangout for Pizza and has become one for Kitty as well. Today, both cats are sleeping in the closet. I wouldn't call that interacting or acceptance necessarily, but I do think it's progress.
That got me thinking about other world problems. What if we locked adversaries in a messy closet and told them they couldn't come out until they were friends or at least would stop trying to kill each other. Would it work? Can we try it? I'm sure my husband would offer his closet for the experiment. Perhaps we can start with our own local bullying problem, then maybe we can move on to Syria. If only...