In my latest YouTube video, I chat with economist and legal scholar David Friedman on free-market anarchism; the Society for Creative Anachronism; tectonic geology; the quasi-anarchic legal systems of medieval Iceland and 18th-century England; being converted to anarchism by Robert Heinlein; how getting a Ph.D. in physics led to being an economist at a law school; the joys of fomenting war and exploiting one’s students; how he repeatedly achieved promotion through violence against his predecessors; how to make medieval armor both for humans and for turnips; how innovations in fireplace design facilitated adultery; and the perils of central planning for wizards.