It's a very optimistic outlook. I hope you're right.

What's uncomfortable for countries in the Western hemisphere is that upon shifting to a multipolar or "spheres of influence" model of the world (which was the norm preglobalization), America will continue its imperialistic tendencies to claim some form of dominion over Canada Mexico and South America. The latest foreign policy strategy document from the Trump administration seems to harken to the Monroe Doctrine (which was a warning that colonization of any further territory in the Western hemisphere by European powers would be viewed as a threat to U.S. security). It seems like Trump sees the Western hemisphere as "belonging" to America on some level.

I also don't see the US competely discarding neoliberalism when it comes to tech / services, where it still dominates. That requires some type of openness to the world otherwise they won't be able to continue to enforce their IP rights. When someone makes a Doordash order in Kathmandu, they want some portion of that transaction flowing through both Silicon Valley and their payment processors (Visa, Mastercard etc). How will the US respond when socialism spreads and those countries make their own versions of these services? Hard to imagine they would respond reasonably, especially since their approach to any resistance up until now has been to stage a coup. Old habits die hard.