But this also has implications for the average youngster, for whom recess has been curtailed and playtime has too often been replaced by videogame time in recent years.
Perhaps, Hillman speculated to me, it may just be that we were designed for the physical and the mental to profoundly work together and reinforce each other. That it's such a part of our make-up that when the former is thrown off because of a modern sedentary lifestyle, it deeply subverts the latter in ways we are only now beginning to understand.
Of course, Bill Gates and his cohorts who changed the world were the product of a generation that probably "sits around" more than any other in history. An irony? Well maybe there isn't a paradox. Maybe we should just imagine what that generation could do if they were all in shape!
The bottom line, so to speak, is that in an age of obesity and desk jobs and kids parked in front of videogames, it's worth reflecting on the incredible value, to the brain and the body, of just regularly going out and taking a fast walk. Or, maybe doing what my mom used to: kicking her five kids outside and saying, "Go play until I let you back in."