Stress is the number one contributing factor to addiction. You know alcoholism is going up in much of the world due to climate change, and going up faster in parts of the world most affected?
Getting someone into housing is an incentive we haven’t tried. Okay, free housing if you get into treatment and take your meds? It reduces stress too, which makes treatment more likely to work. And demonstrates compassion, making therapeutic relationships easier to form and thus, makes treatment more likely to work.
Force doesn’t work. You destroy all trust in the therapupitic process before you even begin.