Fortunately, we get asymmetric security through laws and criminal punishment rather than machine gun bunkers.
Also, MR=MC doesn’t imply that wealth is never created, it just means that it can’t be created purely through exchanging commodities.
Also, MR=MC doesn’t imply that wealth is never created, it just means that it can’t be created purely through exchanging commodities.
In other words, he first assumes that no improvement is possible, and then indeed manages to show that, according to the assumptions, no improvement is possible.