Marylandblue explained the mechanics of it well, but I also see libertarianism as a mental disorder. Libertarians such as Rand and Ron Paul, along with many Republicans, show little empathy or sympathy for their fellow man and so could be classified as psychotics. Many Repugs such as Trump show clear signs of being outright psychopaths.
Out of curiosity years ago around the start of the Iraq war, I read up on Libertarianism after stumbling on the web site antiwar.com (because I was anti-war). The site turned out to be a hotbed for Libertarianism. The more I read, the more it hit me that these guys are extremely naive, and totally in denial of the human condition (primarily in the area of human emotions).
When I read the philosophy, the phrase "no way in hell this will work in practice" keeps popping in my head, so it's completely pie in the sky thinking. Personally, I refuse to waste my time reading Ayn Rand novels.
These are three of their web sites, but be forewarned - it may make your head spin. Like GOP policy, much of it is dressed-up to seem normal!
https://www.lewrockwell.com/
https://www.cato.org/
http://www.antiwar.com/
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