The resource usage of human civilization has arrived at an important inflection point, and so I think the next century will see much more change than the last one. The end of USA's hegemony is a necessary precondition for a socialist revolution, and I don't think the USA can maintain it for another century... so I can't help but come to the uncomfortable conclusion that my own material conditions are going to get a lot worse within my lifetime, and certainly for my children's. If it's going to happen, I think it's going to happen sooner than we think, just because of the pressure cooker the world is in.