“It’s actually unclear how much potency has increased over time. But even if it has, why would marijuana suddenly start causing new chronic psychotic disorders now? Hashish, which can have a THC content of more than 40 percent, has existed for centuries, and high THC marijuana has been available to those willing to pay for it since the 1970s, if not earlier.”

HIGH WIRE|By Maia Szalavitz|Jan 14 2019, 10:31am

All the Things the New Anti-Weed Crusade Gets Horribly Wrong

It’s Reefer Madness all over again, somehow.

Illustration by Lia Kantrowitz

High Wire is Maia Szalavitz’s reported opinion column on drugs and drug policy.

See also:

​Was Marijuana Really Less Potent in the 1960s?

How incomplete government data encourages a pervasive pot myth ADRIENNE LAFRANCEMAR 6, 2015