The federal prohibition of marijuana in the United States has had significant economic and social consequences. Economically, the federal government spent $3.4 billion enforcing anti-marijuana laws in 2008, while Colorado generated $76 million in tax revenue from legal marijuana sales in 2014. Socially, many lives have been negatively impacted by harsh penalties for minor marijuana offenses, including long prison sentences disproportionate to the non-violent crimes. However, some states have legalized medical or recreational marijuana use, helping patients and reducing criminal justice costs. The debate around legalization considers these complex tradeoffs.