History

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Regualtion or prohibitions of marijuana and cannabis arose in many states from 1906 and onward. By the mid-1930s, cannabis was regulated in every state by laws instituted through The Uniform State Narcotic Act. In the 1970s, many places in the United States started to decriminalize cannabis. Most places that have decriminalized cannabis have one or more of civil fines, drug education, drug treatment in place of incarceration, criminal charges for possession of small amounts of cannabis, or have made various cannabis offenses the lowest priority for law enforcement. In the 1990s many places began to legalize medical cannabis, which conflicts with federal laws, as cannabis is a Schedule I drug according to the Controlled Substances Act of 1970, which classified cannabis as having high potential for abuse, no medical use, and not safe to use under medical supervision. Multiple efforts to reschedule cannabis have failed and the United States Supreme Court has ruled in United States v. Oakland Cannabis Buyers' Coop and Gonzales v. Raich that the federal government has a right to regulate and criminalize cannabis, even for medical purposes.

http://brainz.org/420-milestones-history-marijuana/

http://www.narconon.org/drug-information/marijuana-history.html

http://www.druglibrary.org/schaffer/hemp/history/history.htm

http://www.roll-a-joint.com/marijuana-history.html

http://en.wikipedia.org/wiki/Legal_history_of_cannabis_in_the_United_States

http://www.infoplease.com/ce6/sci/A0859487.html