Emily Dufton is a drug historian and writer. She earned a PhD in American Studies from the George Washington University and was a fellow of the American Council of Learned Societies at the Center for Public Integrity. Her first book, Grass Roots: The Rise and Fall and Rise of Marijuana in America, is widely considered the definitive book on cannabis activism in the United States. She has appeared on CNN, HISTORY, and the podcast BackStory with the American History Guys, and her writing has been featured in Time magazine, Smithsonian magazine, and The Washington Post.