I have read a lot of Ayn Rand and other Libertarian writers, and I was ambivalently sympathetic to Libertarianism for many years. Like every philosophical position, it has some truth to it, and some errors. But we are living in a time when the errors of libertarianism are especially dangerous. This is because it requires us to do the exact opposite of what needs to be done to combat the growing market failures causing Income Inequity and global warming.

I gave this lecture on Libertarianism at Sonoma State a few years ago. It argues that most forms of libertarianism are logically incoherent, despite the fact that so many Libertarians keep praising logic. I taught logic for 20 years, and most Libertarians have no idea what the word actually means. There are however forms of “left libertarianism” which correct these incoherencies, and which I think could be useful in designing social programs for the future.

https://www.academia.edu/5393180/A_Critique_of_Libertarianism