Ethan Russo, MD, outlines governmental studies into Cannabis use, including two books written about ganja use in Jamaica, commissioned by the Shaffer Commission in 1972. The Jamaican studies also mention the “Roots Daughters” and debunks the “anti-motivational syndrome” myth associated with Cannabis use. (Cannabis became established in the Caribbean because the sugar plantation owners knew their fieldhands could work harder and longer in the fierce Jamaican sun, mainly due to the vascular dilation action of Cannabis - bringing the blood vessels closer to the skin (reason for red eyes) for cooling and rushing oxygen-rich blood to the muscles.)
Beginning with the India Hemp Drugs Commission in 1893, Dr. Russo reports that every study came to basically the same conclusion -
Society has no cause for concern regarding the effects of Cannabis use on health or crime, and in fact, it has many positives - like medicinal value, spiritual traditions and productivity.