Marijuana Use and Violent Behavior
"Laboratory studies also find no link between THC intoxication and violence. Most people who ingest THC before performing a competitive task in the laboratory do not show more aggression than people who receive placebos; occasionally they show decreased hostility. Numerous scientific panels sponsored by various governments invariably report that marijuana does not lead to violence.(751)"
Carter, Gregory T.; Earleywine, Mitchell; McGill, Jason T., "Exhibit B: Statement of Grounds," Rulemaking petition to reclassify cannabis for medical use from a Schedule I controlled substance to a Schedule II (Office of Lincoln D. Chafee, Governor Rhode Island and Office of Christine O. Gregoire, Governor of Washington: Letter to Michelle Leonhard, Administrator of the Drug Enforcement Administration, November 30, 2011), p. 38.