We do science with the goal of helping people and society, but the science investigating the harms of illicit drugs has not always had a beneficial effect. In Joe’s presentation he reviewed some of our errors in scientific reasoning and understanding that have unintentionally provided fuel for perpetuating the War on Drugs.  Professor Joe Boden is Director of the Christchurch Health and Development Study, Department of Psychological Medicine, University of Otago Christchurch. Contact: joseph.boden@otago.ac.nz