Prisons & the criminal justice system actually increase crime. Gathering all the criminals together in a prison means they all get to share information, skills and ideas with each other. More experienced criminals pass their skills and attitudes down to less experienced criminals, teaching them how to be better criminals. Prisons are universities of crime. Once a prisoner is out s/he often has a tough time supporting him/herself because few employers will hire an ex-con. That difficulty encourages him/her to use their criminal skills, gained in prison, to support themselves, since supporting themselves legally is difficult or impossible. Thus, the system trains them in criminal skills and puts them in a position where they have little choice but to use them in order to survive. In addition, the mistreatment they receive in prison creates a feeling of powerlessness and resentment which they sometimes take out on innocent people once out of prison. If you want to turn someone into a career criminal send him/her to prison.