A lot of what he says about play seems consistent with Huizinga's book. It's not an eccentric theory. Although presumably only behaviours which demonstrate rep

A lot of what he says about play seems consistent with Huizinga's book. It's not an eccentric theory. Although presumably only behaviours which demonstrate reproductive fitness get selected for, I don't think wasteful activities (like art) are necessarily evolved in this way. See e.g. Jeremy England on thermodynamic drivers of evolved complexity.