I don't know if this was an "aw, shi--" moment for our corporate masters and their fools, or just another one of those exercises where we project the ramifications of a war with the Principality of Liechtenstein, but four years ago a report slipped out of the Pentagon on the military implications of catastrophic global warming , with Northern Europe turning to Siberia by 2020.
This is good news for the few surviving Neanderthals waiting for the next Ice Age, with their better adaptation to the cold, but bad news for homo habilis in Scandanavia and Britain. Those scrambling to hold civilization together with Scotch tape and baling wire are in for a hell of a time. Vulcanologists wait with tightened spinchters, because one big volcanic ash cloud would be enough to tip us over into night, with nothing much we could do about that. Hello, 6th century! "Disruption and conflict will be endemic features of life.... Once again, warfare would define human life."
Four years later, and the UN conference on global warming in Bali wants the Pentagon to participate. Love it or hate it, the Pentagon is going to be like the Catholic Church was in the Dark Ages-- the biggest organization of Earth, and the only one with resources and the infrastructure to rescuers, resources and hardware where they're needed in a hurry.
We in the wealthier north can probably dig in, hunker down-- or if you're a Texan, just feel entitled to take what you want-- -- but the Southern Hemisphere, with the wealthy coastal cities like Shanghai and Sidney under water, worsening typhoons and wildfires, massive dislocations of population, will be in a "root, hog, or die" situation.