system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/DC] How does the rest of the world feel about the USA having basically a monopoly on superheroes?
gpt
It oftentimes results in an arms race.  Other world powers try to develop heroes of their own or try to build up deterrents against US hero aggression, such as massive nuclear arsenals.  It's not that these countries want war, it's that they don't trust the US to not abuse its access to metahumans.  

The result of these arms races is that these worlds end up closer to destruction than they would be without heroes.  The clearest example of this is the earth of Dr. Manhattan, but other heroes like Iron Man and Superman have also spurred arms races and heightened tensions.