Should we end the drug war? Almost a century after Prohibition ended, Milton Friedman and Irving Fisher are here to battle over whether substances should be banned or legalized.

Friedman says the ban builds cartel power and makes addicts confess to a crime before they can get treatment. Fisher says ban the sale, never the user, because a habit is a chain the addict can’t break alone.

Which economist is dope, and which one’s just blowing smoke?