The history of cannabis in the United States is a complex journey shaped by shifting social attitudes, political movements, and evolving laws. From early 20th-century prohibition to the sweeping legalization efforts of the 21st century, cannabis policy has reflected broader debates about medicine, criminal justice, and individual freedom. This timeline traces key moments in U.S. cannabis history—highlighting landmark legislation, court rulings, and cultural turning points that have shaped how the country views and regulates the plant today.
This is a work in progress.
Arizona - Jan. 22, 2021
The first state-licensed recreational marijuana sales began in Arizona, making it the fastest state in U.S. history to move from voter approval to retail sales.
Arizona - Nov. 3, 2020
Arizona Proposition 207, known as the Smart and Safe Arizona Act, passes with 60% of voters approving the measure which legalizes adult recreational use of marijuana.
Arizona - Nov. 2, 2010
In 2010, Arizona voters approved Proposition 203, legalizing medical marijuana for patients with qualifying conditions.