The world's wealthiest nations have expended vast blood and treasure in tracking and capturing traffickers, dealers and consumers of narcotics, as well as destroying crops and confiscating shipments. Yet the global trade in illicit drugs is thriving, with no apparent change in the level of consumption despite decades of prohibition. This Adelphi argues that the present enforcement regime is not only failing to win the 'War on Drugs'; it is also igniting and prolonging that conflict on the streets of producer and transit countries, where the supply chain has become interwoven with state...