I'm surprised none of the responses here are discussing climate change. Unlike other concerns, higher average global temps are baked in for centuries, even if we stopped all greenhouse gas emissions today (which, obviously, is not happening).
I put in a "yes" vote for the hinge of history simple due to the fact that our inability to drastically restructure our economy today will severely negativity affect billions in the future. Keeping global warming below 2°C is a pipe dream IMO, and the big question remains to be seen of whether we see big positive feedback loops that result in greatly increased warming (8°C or so). If that happens, WWII will look inconsequential by comparison.
I put in a "yes" vote for the hinge of history simple due to the fact that our inability to drastically restructure our economy today will severely negativity affect billions in the future. Keeping global warming below 2°C is a pipe dream IMO, and the big question remains to be seen of whether we see big positive feedback loops that result in greatly increased warming (8°C or so). If that happens, WWII will look inconsequential by comparison.