After 40 years of defeat and failure, America's "war on drugs" is being buried in the same fashion as it was born – amid bloodshed, confusion, corruption and scandal. US agents are being pulled from South America; Washington is putting its narcotics policy under review, and a newly confident region is no longer prepared to swallow its fatal Prohibition error. Indeed, after the expenditure of billions of dollars and the violent deaths of tens of thousands of people, a suitable epitaph for America's longest "war" may well be the plan, in Bolivia, for every family to be given the right to grow coca in its own backyard.