A HUNDRED years ago a group of foreign diplomats gathered in Shanghai for the first-ever international effort to ban trade in a narcotic drug. On February 26th 1909 they agreed to set up the International Opium Commission—just a few decades after Britain had fought a war with China to assert its right to peddle the stuff. Many other bans of mood-altering drugs have followed. In 1998 the UN General Assembly committed member countries to achieving a “drug-free world” and to “eliminating or significantly reducing” the production of opium, cocaine and cannabis by 2008.
