1) Crime and punishment have evolved throughout history as governments and philosophies have changed. Different theories on criminology have attempted to understand and prevent crime.
2) The US criminal justice system involves law enforcement, courts, and punishment. It uses a jury system and separates powers to prevent authoritarian rule.
3) There are different types of prisons in the US based on security level that house inmates depending on their crimes. Faith-based and vocational programs aim to reduce recidivism but have not shown significant impacts so far.