As a libertarian, if there's one thing I don't like about Libertarianism[0], it is specifically the economists. The problem with libertarians of all stripes is that we're blind to informal power structures[1]. In right-wing libertarian economics this manifests as:

- A supreme allergy to competition law.

- Externality denialism as a nervous tic.

As an example of the latter:

>When climate change replaced population growth as the looming catastrophe that all of the authorities insisted something should be done about, I took the same approach to that issue and reached the same conclusion.

I'll give this guy the benefit of the doubt solely because overpopulation was, as far as I can tell, veiled Nazi shit. On the other hand, the argument against climate change here boils down to "well humans will adapt", which... I mean... technically yes?

The biggest adaptation is going to be people moving out of their home countries, which isn't an option for the vast majority of humanity. Immigration is not recognized by most countries as a right. If we bake the Middle East or Africa and it becomes unlivably hot, the answer countries are going to choose isn't going to be "admit hundreds of millions of climate refugees". I'm absolutely one of those "migration is a human right" people, and if David Friedman is anything close to consistent, he'll be too. But most governments are run by people who vehemently disagree with that and you're not going to sell people on open borders as an alternative to climate change mitigation.

Also, some of the actual arguments this guy uses are just... oh my god:

- Sea level rise isn't a problem because most land will not be flooded. Land ISN'T FUNGIBLE, improvements on land CAN'T BE MOVED, and the people getting flooded can't sell their homes to Aquaman. As an economist, it's your literal job to know this.

- Warming is Good Actually because more people die of extreme cold than extreme warm. How are you THIS sure global warming will only result in local warming?! Global warming is an average, and so far, we've seen local increases in both warming and cooling (e.g. the polar vortex weakening).

Yes, humans can adapt, but that adaptation isn't anywhere close to free, and that cost is not going to be borne by the people emitting.

[0] Capital L, or right-libertarianism specifically. And of course excluding all the authoritarians cosplaying as libertarians because being the Supreme Leader feels a lot like freedom if you squint.

[1] See also: The Structurelessness of Tyranny, which was targeted at left-libertarians