Introduction: Philosophers, cognitive and social psychologists and laypeople often subscribe to the view that willpower is central to recovery from addiction. But there are reasons to suspect that willpower is much less important to explaining recovery than this view suggests. Methods: Here we report findings from a qualitative longitudinal study on how substance dependent people see their agency and self-control, and how their self-control develops over time. 69 opioid, alcohol and methamphetamine dependent people were interviewed over a 3 year period. Results: Most of the participants described themselves as strong willed; in fact, as very strong willed. However, there seemed no correlation between having a (self-assessed) strong will and...