This 1944 report offended
Harry Anslinger, head of the
Federal Bureau of Narcotics, who claimed it was "unscientific". The study conducted by AMA between 1944 and 1945 on Anslinger's personal request, having as objective to disprove the statements of the LaGuardia Report, leveraged again on
racism, asserting that "of the experimental group, thirty-four men were black, and only one was white", and "those who smoked marijuana, became disrespectful of white soldiers and officers during military segregation". Only in 1972, the same institutional source that spread the series of scientifically unfounded rumors about the dangers of cannabis admitted that "these stories were largely false" and that "with careful consideration of the documentation there is no confirmation of the existence of a causal relationship between marijuana use and the possible use of heroin". Thus, it was declared that the ban on cannabis was imposed and still subsisted "without any serious and comprehensive research had been conducted on the effects of marijuana". ==See also==