Part 1 of 9 - get the rest on YT if you like
YouTube - Aldous Huxley - The Ultimate Revolution part 1
I can't really say this is about the next century, because many of these techniques are already being used. Force is an outdated method of control, especially in a world with WMD.
The Yellowstone supervolcano had me worried for a bit, it had its highest levels of activity in recorded history up until 2009 when it slowed down. Last time a volcano that size erupted most people died. Sure, we have better technology now but we also have many more mouths to feed, which would become quite difficult during a volcanic winter.