We conclude the year (or begin the next one, however you want to see it) with the final episode on Sapiens, a book that holds the promise to change more than just one of one's perspectives about the world, while being highly entertaining.

This time: How come we started to believe so firmly that things would become better in the future all of a sudden? Why didn't we believe that earlier and what does this fundamental belief – upon which a large part of our economy relies – mean for sustainability?