Resumen: The World Drug Report presents comprehensive information on the illicit drug situation. It provides detailed estimates and trends on production, trafficking and consumption in the opium/heroin, coca/cocaine, cannabis and amphetamine-type stimulants markets. The drug problem is being contained but there are warning signs that the stabilisation which has occurred over the last few years could be in danger. Notable amongst these is the increase in both opium poppy and coca cultivation in 2007,some growth in consumption in developing countries and some development of new trafficking patterns. There have also been encouraging contractions in some of the main consumer markets. This year, almost one hundred years since the Shanghai Opium Commission in 1909, the Report presents an historical review of the development of the international drug control system.