Wallace-Wells talks about humanity’s existential threats The Uninhabitable Earth reveals the true pace and severity of climate change. Author David Wallace-Wells talks about humanity’s existential threats, but also how humans respond to this really urgent news. Some don’t want to know, others lapse into despair. “The author does a good job of pointing out that our future is really unknown. Most importantly, how will humans behave to try and save the biosphere. If somehow we all pull together we may be able to mute the worst of our possible futures. Also, he acknowledges that future technology is a possible game-changer, although he is not optimistic,” said a review published in goodreads.com. “The author’s own career focuses on climate change, and he has all the sources and resources at his command. It shows clearly in the breath of data he draws on. And they are all connected, with feedback loops and knock-on effects that can magnify a bad situation into a disaster. Wallace makes those connections clear,” it added.