G. Alan Marlatt: 1941–2011

In his extraordinarily productive research career, G. Alan Marlatt contributed to and anticipated by decades a variety of major changes in the treatment of substance use disorders. This article briefly reviews and comments on his contributions to addiction psychology, cognitive–behavior therapy, alcohol expectancies, relapse prevention, moderation goals, harm reduction, and mindfulness meditation research. He departed suddenly and too soon, but left us with a rich heritage for more effective and humane treatment of those who suffer with addiction.