Earlier quoted context omitted.
Yeah, I thought this was funny too. I literally read the same sentence and thought to myself: "ok, I am definitely not an anarchist.
So you only make reasonable choices because you are forced to?
A classic example is something like fishing. As an individual, it is entirely reasonable for me to catch as many fish as possible. I won’t put a dent into the fish population, and the more fish I catch, the better it is for me.
However, if everyone fishes as much as they want, the fisheries will be depleted. It is reasonable for an individual to fish as much as they want, but not for a society.
So why doesn’t everyone just fish less, because that is the reasonable thing for the society to do? Well, in an anarchy, I can only choose for myself. If I fish less, but everyone else still fishes as much as they want, then I will have less fish AND the fishery will still be depleted. I am worse off for no gain; it is clearly reasonable for me to fish as much as I can, since the fishery is going to be depleted no matter what.
Even if by a miracle everyone else agreed to voluntarily fish less, it would STILL be in my interest to ‘defect’ and fish as much as I want. My individual choice isn’t going to cause an issue if everyone else is already fishing less, so now I get more fish AND the fishery is fine.
Bottom line, no matter what everyone else does, my rational choice is to fish as much as I want. If everyone is rational, the fishery will be depleted.
This is known as a collective action problem, and is a type of prisoner’s dilemma.
You can’t get out of it through individual rationality. You have to approach the problem collectively.