The document summarizes the history and evolution of imprisonment and community-based sentencing in the United States. It notes that imprisonment became widespread in the last 200 years, replacing punishments like money payments and corporal punishment. Penitentiaries were introduced in the US in the 1800s with goals of labor, silence, and penitence. In the late 1800s, reformatories opened with aims of reforming prisoners and teaching them skills. By the 1900s, prisons were called correctional facilities and alternatives like parole and probation became popular in the 1960s partly due to their lower costs compared to imprisonment. From 1985 to 2004, the prison population in the US tripled largely due to stricter drug laws, and the US