LinkedIn question: which will be the most powerful country in the year 2025?

Jingoism aside, here is a consideration:

For all its well-publicized problems, the US is still the only country in the world whose proven 200+ year democratic structure has promoted the peaceful and productive coexistance of all the races, cultures and languages of humanity. And that has acted as a powerful magnet drawing millions of hard working, brilliant people every year from every part of the planet who dream of a place where they can realize their potential. It is hard to imagine and wrong to underestimate the force those combined dreams have.