The US can’t or shouldn’t be The World Police.
If not the US, then who? Of the most powerful nations on Earth, which one has a sustainable economy and a political system and set of laws that are just and humane?
Wait, I’ll list the candidates. Based on military strength, economic power, and political influence, the most powerful nations on Earth are the USA, China, Russia, Germany, and the UK.
Because one of the aspects of being the "world police” is the ability to take in and safely harbor and provide for millions of people at once if necessary, we have to omit Germany from the list. Germany's got everything except adequate acreage.
As for the UK, while massive Canada and Australia are part of the UK Commonwealth, they have their own governments and are sovereign states, and can’t be forced by the king of England to urgently accept millions of immigrants at once who are fleeing genocide, war, starvation, or atrocities, and, though it’s comprised of England, Scotland, Wales, and Northern Ireland, Britain is many times smaller than the USA.
For that reason, the UK and its Commonwealth nations are more suitable as safe havens for immigrant over-flow and a source of economic and military support…at each country's discretion, of course.
That leaves the USA, China, and Russia as best equipped and least geographically and geopolitically complex candidates for the role of “World Police,” but which of the three would you consider the most just and humane?
For people escaping the horrors of extreme oppression, endless fear, the harshest forms of discrimination, inescapable poverty and hunger, mass displacement, or outright genocide, the USA is the obvious choice.
So, the question we should ask ourselves is "Why does the world need policing?"