A guy who can't fit into society and steals - you lock up in prison. Kind of forget him until he steals again. Then you lock him up again. A PRISONER At a time when our prisons are overcrowded and longer and longer sentences are being imposed Tony Parker examines the effect of imprisonment on men now, and what this means for the future. The purpose of the training and treatment of convicted prisoners shall be to encourage and assist them to lead a good and useful life. THE PRISON RULES: RULE 1 What sort of life do prisoners lead inside? How does imprisonment change them - does it in fact help them to lead a good and useful life? First-hand evidence from former prisoners, prison officers, a prison Governor, and others concerned with the treatment of offenders.