Earlier quoted context omitted.
The world is 100% legally zero sum unless you can legally appropriate property with no money or any other type of compensation then where is this magical free pie?
The world is trivially not zero sum. If it were zero sum we would all be living worse off than medieval peasants
We may no longer be peasants (hard to prove), but a large number of extinct species and ecological disasters would like to argue the “not zero sum” point.