Does imprisonment meet the aim of public protection
+ takes offender out of circulation and thus protects the public
+ Most are released on license or have post-sentence supervision, so must behave, or can be recalled to prison if they break the terms of their license.
-- Can be a university of crime
--Prison buys some public protection, but this is only temporary.
--It is very costly – money could be better spent on some form of rehabilitation to protect the public in the long-term