The first advantage of decriminalising marijuana is that it can be used for medical field. Countries such as Canada, United States, and Holland make some laws to decriminalise marijuana for medical use, or personal use. According to Greenwell (2011, pp. 68-69), marijuana can relieve several appointed pain situations, including cancer pain, multiple sclerosis, and generalised nerve pain. Marijuana can be beneficial for the patients who are suffering from peripheral neuropathy, and it also can assist HIV patients to reduce the nerve pain, which other conventional medicine cannot relieve (Arias, 2007). As marijuana would be able to use for medicinal purposes, HIV patients would have profits from legalisation of marijuana.
In addition, legalising marijuana can decrease the rate of crimes. Marijuana is the same as tobacco and alcohol, which cannot cause death and crime directly. However, as marijuana is an illicit drug, people’s selling and purchasing is a kind of criminal behaviour, and the price of marijuana is extremely high, which means traffickers can obtain enormous profits from marijuana trade. Therefore, traffickers may fight or murder