By David A. Graham
There’s a whiff of change – or something – in the air these days. News outlets are abuzz with stories on the possibility of looser marijuana laws, from decriminalization to medical-use exemptions, and partisans on both sides are taking to the media to push their messages. That’s nothing new. For decades, anti-drug and pro-pot campaigners have tried to convince Americans that marijuana is either bad or not that bad, man, with filmmakers and authors following suit. From the exploitation films of the 1940s to the famous “This Is Your Brain on Drugs” ad, a look at nearly eight decades of pot propaganda.