The legal status of marijuana has been a topic of recurring interest in recent years. Marijuana was initially placed and today remains as a Schedule I controlled substance under the Controlled Substances Act (CSA). As a result, a person who grows, possesses, uses, sells, transports, or distributes marijuana, even if it is done in a way that is consistent with State law or authorized by a State license, is nonetheless in violation of the CSA and remains subject to Federal prosecution. This book outlines the laws that apply to controlled substances like marijuana, then analyzes several approaches that can be taken to change those laws.