The U.S. has had a love-hate relationship with cannabis throughout the decades. Until the early 20th century, marijuana was legal across the nation. However, the Marihuana Tax Act of 1937 made it illegal to produce and sell the cannabis plant. Yet, perspectives have changed, and various health benefits have been identified since cannabis was banned and criminalized. For these reasons, many U.S. states have legalized the production, sale, and use of medical marijuana, and many more are legalizing the cannabis plant for recreational use.