Dr. Carl Hart in The Atlantic

September 17, 2014
Blurb
Here’s what we do know: According to many studies, the lifetime risk of dependence—defined as a desire to use increasing amounts of a substance and suffering withdrawal symptoms if you don’t—is lower for marijuana than it is for most other drugs, including alcohol...

Hart, who advocates for the decriminalization of all drugs, says research shows fewer people become dependent on drugs if they are given other options for recreation.
The idea that crack users who take one hit will get hooked, “comes from experiments conducted in the 1960s to 1970s,” he said in his TEDMED talk. 

 Read more: http://www.theatlantic.com/health/archive/2014/09/is-marijuana-more-addi...