If a marketplace of ideas truly exists with rational actors serving as discerning consumers, then, as we have been assured by free speech absolutists, good ideas will cancel out bad ones. If that’s true of how this marketplace works in practice, then how can the resurgence of Nazism be explained? These ideas should have been flushed away with the Fuhrer. And yet pernicious attitudes about racial superiority and Jewish sub-humanity are still being peddled in far too many circles.
