On one hand, since the US is the world's largest, strongest economy (though China is challenging this), and the world’s financial center as well, together with being the main influencer through mass media and entertainment, whatever happens in America has great consequences all around the world.
On the other hand, since we have evolved into a globally integrated and interdependent world, each and every country, or even individual person exerts influence on everybody and everything.
We are starting the age of “one for all, all for one”, where the so-called “butterfly effect” operates with full force.
And while there will always be bigger and smaller cogwheels, even the smallest cogwheel can bring the whole system to screeching halt if it doesn’t function optimally, turning together with all the other cogwheels.
And it is the same for the largest cogwheel as well. Being the largest makes it even more responsible for the balance and most optimal well-being of the whole system.
The earlier, usual, ruthlessly competitive, exploitative behavior, where each tries to succeed, survive at the expense of others is over.
After all, when we are all sitting on the same global boat, we can’t keep drilling holes underneath each other as then we all sink and drown!