The recurring advice for writing any good story: keep the interesting parts, remove everything else. If you watch a good biopic, you wouldn’t want to know about their boring afternoon visit to the doctor unless it contributed to the screenplay of the movie.

Being relentlessly and randomly curious about everything around us is something that each of us can push ourselves to do, every waking hour, just as Leonardo did.

We care so much about fairness that we are willing to sacrifice economic well-being to enforce it. Research shows that just to ensure shirkers get what they deserve, we are prepared to make ourselves poorer.