The history of marijuana policy is a good example. In the early 1900s, marijuana was perceived—rightly or wrongly—as a drug used by blacks and Mexican Americans, leading to the Boggs Act of the 1950s, penalizing first-time possession of marijuana with a sentence of two to five years in prison.68 In the 1960s, though, when marijuana became associated with the white middle class and college kids, commissions were promptly created to study whether marijuana was really as harmful as once thought. By 1970, the Comprehensive Drug Abuse Prevention and Control Act differentiated marijuana from other
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