UNTIL recently it seemed that nothing would disturb the international consensus that the best way to deal with narcotic and psychotropic drugs is to ban them. Codified in a United Nations convention, this policy has proved impervious to decades of failure. Drug consumption has not, in most parts of the world, fallen. Prohibition inflicts appalling damage, through the spread of organised crime, the needless deaths of addicts exposed to adulterated drugs and the mass incarceration of young men.
