Yeah, maybe it isn't zero sum when you include time dimension, but at each point in time, it still is zero sum. Why that matters? Because humans need to eat at

Yeah, maybe it isn't zero sum when you include time dimension, but at each point in time, it still is zero sum. Why that matters? Because humans need to eat at every point in time, and have limited timespan. In fact most of the today's wealth was generated by people who are long dead. Despite this wealth being effectively "free", it is still a zero sum game how to distribute it.