Some thoughts on Prohibition
These extracts from a 1997 article seem still relevant today and maybe even more so as the problem escalates.
The arguments in favor of legalizing the use of all narcotic and stimulant drugs are twofold: philosophical and pragmatic. Neither argument is negligible, but both are mistaken, I believe, and both miss the point.
The Philosophic Argument
The philosophic argument is that, in a free society, adults should be permitted to do whatever they please, always provided that they are prepared to take the consequences of their own choices and that they cause no direct harm to others. The locus classicus for this point of view is John Stuart Mill’s famous essay On Liberty: “The only purpose for which power can be rightfully exercised over any member of the community, against his will, is to prevent harm to others,” Mill wrote. “His own good, either physical or moral, is not a sufficient warrant.” This radical individualism allows society no part whatever in shaping, determining, or enforcing a moral code: in short, we have nothing in common but our contractual agreement not to interfere with one another as we go about seeking our private pleasures.
So the legalization of drugs cannot be supported by philosophical principle
The Pragmatic Argument
The argument is that the overwhelming majority of the harm done to society by the consumption of currently illicit drugs is caused not by their pharmacological properties but by their prohibition and the resultant criminal activity that prohibition always calls into being. Simple reflection tells us that a supply invariably grows up to meet a demand; and when the demand is widespread, suppression is useless. Indeed, it is harmful, since—by raising the price of the commodity in question—it raises the profits of middlemen, which gives them an even more powerful incentive to stimulate demand further. The vast profits to be made from cocaine and heroin—which, were it not for their illegality, would be cheap and easily affordable even by the poorest in affluent societies—exert a deeply corrupting effect on producers, distributors, consumers, and law enforcers alike. Besides, it is well known that illegality in itself has attractions for youth already inclined to disaffection. Even many of the harmful physical effects of illicit drugs stem from their illegal status: for example, fluctuations in the purity of heroin bought on the street are responsible for many of the deaths by overdose. If the sale and consumption of such drugs were legalized, consumers would know how much they were taking and thus avoid overdoses.
Analogies with the Prohibition era, often drawn by those who would legalize drugs, are false and inexact: it is one thing to attempt to ban a substance that has been in customary use for centuries by at least nine-tenths of the adult population, and quite another to retain a ban on substances that are still not in customary use, in an attempt to ensure that they never do become customary.
Full story at; City Journal, Vol 7, No. 2, Spring 1997, Manhattan Institute