Gosh, I would have called the world of 1870 and 1913 multi-polar. That didn’t work too well, did it?
Right...and there was an ethnic minority problem in Hungary where the Arch Duke got himself shot.
Was the shooter a Muslim? I don’t remember.
It worked out fine for the United States as long as we followed George Washington's wise advice to avoid foreign turmoils. I am all for a multipolar world if it allows some other nations to do the bulk of the national power draining heavy lifting to maintain the balance of power in their own regions.