The Tragedy of the Tragedy of the Commons
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What the paper gets wrong, if anything, is that populations can and do stabilize--even begin to shrink--much earlier than ever anticipated. More importantly, this occurs not in the face of disease or hardship but seemingly paradoxically because of wealth and selfishness. But that was never self-evident judging by how universally unchecked population explosion was assumed back then and how difficult the reality remains for people to appreciate even today. We only understood this after it had already come to pass in nations like Japan, and in general scholarship only relatively recently has it become presumed as a possible and natural outcome in the due course of industrialization.
This also wouldn't be the first time that a scholar put forth a remarkably simple and accurate statement of natural dynamics and then subsequently failed to apply their own argument with sufficient rigor and restraint, resulting in suspect secondary conclusions.
EDIT: And the extent to which the modern environmental movement relies on it is nothing to do with the details of the motivating example, it's entirely at the level of the broad game theory and desire to interpose an regulatory force to rearrange the incentives by internalizing externalities so that the payoff matrix for individuals no longer promotes universal defection, enabling the more optimal outcome to be acheived.
Please don't take this to mean I want to defend Hardin here. But just saying "the guy who wrote this was a racist" and "it's based on some really old essay" does not convince me that the argument itself is flawed.
I wish I'd gotten some nerdy know-it-all material to throw at someone the next time they bring up the tragedy of the commons :/
[0]user wahern (in the comment section here) re-read the original paper and confirms this suspicion of mine