Cannabis users now develop psychosis at five times the rate of non-users. The NIH estimates that 30 percent of schizophrenia cases among men aged 21-30 are caused by cannabis.

As I lay moaning in the emergency room, it dawned on me how badly our country had screwed up.
I’d been admitted for intractable nausea. By a weird coincidence, the young woman loudly retching in the…