When America deteriorates into a giant slum one day (with pockets of frightened rich whites and asians living in gated communities with heavily armed security), I suspect other nations and cultures will start to revert back to their own traditional ways.
The time that we are living under is a time where America is still the dominant global super power. The final stage of Pax Americana before it becomes irrelevant. Its influence is far reaching. Other nations mimic America to try to compete with it, stay relevant, or just play along. The old saying "if you can't beat them, join them" still applies to the global situation were in.
On the bright side, America really is in its final days.
The open free (but incredibly unfair) world that we live under has America as the leading influencer and enforcer. With America gone, the world will go back to how it always was. Not as open but at least fair. An objective world. Natural history resuming. There will be regions and sub-regions where nations develop in a slow but even and equal basis. With a free open world, America just becomes richer and richer before it implodes and self destructs in its degenerate glory, taking down the world with it.
One day the world will be better...
Just not within our lifetime.