> There’s another factor that makes the threat of asteroid impacts a unique opportunity for global unity. Unlike some more localized natural hazards, like volcanic eruptions and tsunamis, these kinds of impacts are theoretically preventable. “It’s the only natural disaster that we really have the ability to—at least in principle—prevent,” says Barbee. “That creates a certain type of international collaboration that is very unique.”

The desire the unify the world is powerful. It might even be deeper than any surface issues. Sometimes I wonder whether, if we invented some machine that quickly and easily pulled carbon out of the atmosphere, people would adopt it or still continue to push for a global agreement. I think they'd adopt it but then they would look for other ways to unite the world.