Comment Likely doomed as a species (Score 5, Insightful) 72
The changes we have set off in the world today are not unlike those that precipitated the Great Dying 252 million years ago. We're at 420 ppm CO2 now but the permafrost is done for and after that the clathrates in the shallow seas are liable to let go, too. The current ice age is only 2.5 million years old and we've ended it. We may have triggered something akin to the Permian/Eocene Thermal Maximum.
There was some chance we could have headed this off, had we turned immediately and aggressively on the problem around the turn of the century. We have proven politically incapable of addressing this existential threat, and now that we might be mustering the will, the window may have closed.
We've had a good run, we anatomically modern humans, but this ending due to a lack of foresight is