John Hudak is deputy director of the Center for Effective Public Management and a senior fellow in Governance Studies. His research includes state and federal marijuana policy. John’s 2016 book, Marijuana: A Short History, offers a unique, up-to-date profile of how cannabis emerged from the shadows of counterculture and illegality to become a serious, even mainstream, public policy issue and source of legal revenue for both businesses and governments. In it, he describes why attitudes and policy have changed, and what those changes mean for marijuana's future place in society. Follow him on Twitter @JohnJHudak