Hey, the reason the United States has the most superheroes is probably because they pay better here than other foreign powers. At least in the Kickverse, where super-heroing is a capitalistic venture. This was also the premise in a superhero campaign world I was creating for a Mutants & Masterminds game. One day, 1 out of every 100,000 people gains super powers. Take a look at the population of most countries and see what happens to the balance of power. So shortly after the event that created all the superheroes, there is a super humans “arms” race, with the U.S. diverting 100’s of millions away from traditional military and paying supers to become U.S. citizens.
That’s what they are doing with Java.