Earlier quoted context omitted.
That's great, but what does that actually mean for someone? Does it mean that they are less happy? Does it mean that they earn less money? Does it mean they have less meaningful relationships? I understand the mechanisms behind marijuana use, but what is the real effect on a person's life?
From the linked article > Heavy marijuana use in adolescence or early adulthood has been associated with a dismal set of life outcomes including poor school performance, higher dropout rates, increased welfare dependence, greater unemployment and lower life satisfaction.
Show me the development of a teen in a society where open marijuana consumption is a non-issue to compare against.