Opium and morphine are certainly dangerous, habit-forming drugs. But once the principle is admitted that it is the duty of government to protect the individual from his own foolishness, no serious objections can be raised against further encroachments. A good case could be made out in favor of the prohibition of alcohol and nicotine. And why limit the government's benevolent providence to the protection of the individual's body only? Is not the harm a man can inflict on his mind and soul even more disastrous than any bodily evils? Why not prevent him from reading bad books and seeing bad plays, from looking at bad paintings and statues and from hearing bad music? The mischief done by bad ideologies, surely, is much more pernicious, both for the individual and for the whole society, than that done by narcotic drugs.
These fears are not merely imaginary specters terrifying secluded doctrinaires. It is a fact that no paternal government, whether ancient or modern, ever shrank from regimenting its subjects' minds, beliefs, and opinions. If one abolishes man's freedom to determine his own consumption, one takes all freedoms away. The naive advocates of government interference with consumption delude themselves when they neglect what they disdainfully call the philosophical aspect of the problem. They unwittingly support the cause of censorship, inquisition, intolerance, and the persecution of dissenters.
-Ludwig von Mises, Austrian-born NYU Professor and free market advocate, 1949