Prisons in this country did not fill simply because crime went up, police arrested more people, and judges sent them to prison. The crime surge’s primary contribution was that it fostered an environment where politicians and the public became attracted to harsh criminal laws. The steady ratcheting up of the severity of American criminal law played a larger role in Mass Incarceration than the transitory crime rise. This chapter introduces the critical punitive pattern: crime leads to public outrage, and outrage leads to harsher laws.