: I can see "human nature" invoked as regards things such as eating -- since all human cultures involve some interaction with food, it's logical to assume that it's "human nature" to eat once in a while. But "comparative advantage"? No way.
If humans eating is natural, the standard being their life, then would you accept that where one person / group currently holds an advantage over another they would seek to hold it where the condition for loing that advantage is in losing the current level of food they have.
I would accept that they would likely not care if the 'poorer' group started generating their own food without effect on the first group, but would seek to protect their current position if the 'poorer' group came to claim a proportion of the first groups foods