The Marijuana Policy Project (MPP) is a non-profit organization based in the United States that advocates for the reform of marijuana laws. Founded in 1995, MPP aims to promote policies that allow for the legal use of marijuana for both medical and recreational purposes. The organization works to educate the public and lawmakers about the benefits of marijuana legalization and the harms of prohibition. MPP engages in various activities, including lobbying for legislative changes, supporting ballot initiatives, and providing resources for local advocacy groups. By collaborating with other organizations and stakeholders, MPP seeks to create a more equitable and effective approach to marijuana policy across the country, influencing states like California and Colorado in their legalization efforts.