Canadas multiculturalism approach is working great. It’s the American melting pot that has dissolved into tribal identity politics. It helps that Canada can have more than two parties to vote for - when Americas 2 political parties go off the rails, there isn’t a third you can switch to who is acting more maturely

Let's pretend there were a nation of clones with an economy based on coal-mining. One day the demand for coal drops to zero and this spells economic doom. No matter that they're all clones; the angry citizens, looking for scapegoats, will divide society by zip code or gender or birth-date, and clash over that.

People 'descend into tribal politics' when they feel the outlook for their society is worsening. That is the driving force that determines whether society considers itself homogeneous.

People accept most any system of government when there is optimism in the air.

I think there is still tribalism within a homogenous society with respect to its place with other societies in the world. Within multicultural societies, there's the risk of systemizing economic hierarchies and niches between identities. A healthy society would do well to avoid this pigeonholing.