I'll have to decide whether I'm more allergic to doomerism or techno-optimism. Just the cover and summary sound bad for "we could be on track to achieve true sustainability for the first time in history": sustainability is something that most generations ever had to do. Maybe it means that now we will never have to wipe out charismatic megafauna ever again, as early humans did, but given our leaders our chance of doing that again is quite high.