A question I'm left with is "who did Bill McKibben write this book for"? Given the first 1/3 of the book is a collection of stats and information about climate change one can surmise the audience would be those already in the climate change affirmation camp. Then the book takes a twist and focuses on sociology and the future of man. It's definitely thought provoking. I'd encourage you to push through the halfway point before setting it aside as another book about climate change. It's much more than that, it just takes a while to reach the destination.