This article is from the Atlantic. The full article is here: https://www.theatlantic.com/health/archive/2017/01/teens-drugs-iceland/513668/
Several psychiatrists found that children were predisposed to drugs before they even did drugs.
It is all about how the children approach life.
Some attack life and some hide and withdraw.
The attackers love uppers and speed.
The withdrawers love heroin.
The answer: keep young children busy after school.
Direct them towards activities that leverages their predisposition.
Great article.