The new book American Purgatory: Prison Imperialism and the Rise of Mass Incarceration tells the story of American incarceration, from its roots in racial slavery and colonialism to the present day, through the stories of the people who built resistance and freedom movements from within its confines.
Twenty years after then-U.S. Secretary of Defense Donald Rumsfeld made a now-famous statement distinguishing "known knowns," "known unknowns" and "unknown unknowns, a UC Davis economist is developing a logic for analyzing the most unpredictable category — the “unknown unknowns.”