I think the next 50 years are going to present the human...

I think the next 50 years are going to present the human race with challenges that so far exceed the limitations of geopolitical boundaries or nationalist identity. We're going to be up against challenges that we can barely fathom at this point. So how we embrace them and deal with them will define a great many things about where we go, but, you know, it's hard to say. We're teetering on the edge, I would say.