Regulations and restrictions on the sale of Cannabis sativa as a drug began as early as 1619. Increased restrictions and labeling of cannabis as a poison began in many states from 1906 onward, and outright prohibitions began in the 1920s. Source : Wiki Cannabis the only plant worth planting everywhere on the planet, not just used to get high in its many forms it has many different uses , i.e.: Hemp Help end mass poverty. Hemp for fuel fiber & fabrics, The big ass pharmacy & Oil companies wont allow the laws be changed as they have the big business wrapped up. Its all about profit when they could think profit an help add few extra years onto this globe. I don't know what do you think? humans before profit Research Suggests Cannabis Cures here's some links to assist your studies. Uruguay may treat addicted prisoners with medical pot http://www.tucsonsentinel.com/nationworld/report/050514_marijuana_uruguay/uruguay-may-treat-addicted-prisoners-with-medical
The drug war shouldn't exist...