Prisons are necessary unless we want to return to a system of corporal punishment or unless people all of a sudden become angels. With human nature being what it is, there will always be crime and something will have to be done to/with criminals. Prisons remain the only choice that is likely to be acceptable to most people.
If a person sticks a gun in someone else's face and robs them, what can we do with them? We can beat them or kill them as punishment but we no longer believe in such things for that sort of a crime. We could send them to some sort of educational facility to try to teach them how to be a productive member of society. However, that is not likely to satisfy most people because it is not much like punishment and it does not keep us safe from the person while he (presumably) is being rehabilitated.
With those options out of the question, prison is the only feasible choice. Therefore, we will need prisons for the foreseeable future.
Yes, prisons are necessary. Imagine how this world would be without them, we would have dangerous criminals running around our children, sibiling, or people we care about without knowing what they might be teaching them or doing to them. Prison is a good place for people who have committed a crime to go to and hopefully have them realize how they're throwing their life away by doing things that gets them there.
Many Governments around the world have invested heavily in the construction and maintenance of prisons which continue to embrace a continuing growing prison population. Governments have seen it appropriate to try to capture the problems of the wider society after they have left the proverbial stable.
Prisons have become a place to dump the problems of our wider societies, as we all well know, this can be a very "smelly" undertaken laden with many "toxins" and "hazards".
Prison life can convert the humblest and caring of individuals into the hardest of criminals. Prisoners who are instituted are of the elk of rapers, murderers, and thieves, and might be combined with those who have performed less unsociable acts. Which begs the question. Are prisons necessary?
prisons are a necessary evil in order to act as a deterrent for acts which are in opposition to what the wider society believes and accepts. But the advantages are now quickly overtaken by the disadvantages of such a system. The prison system at times incarcerates individuals, for minor offences; and increases the criminal IQ of many.
This has lead to waste of taxpayer's money, because these persons then leave prison with a higher criminal IQ than what they previously had; shame on their backs for having attended prison, and the stigma to deal with as society believes once a criminal always a criminal.
Many are confronted with not being
able to acquire proper employment and in some instances return to prison as a result.
The solution is not to imprison our young healthy and bright minds, who might have gotten involved in minor offences such as purchasing drugs, some cases of theft etc. These persons can be punished in other ways which wouldn't involve the taxpayer pulling his pocket.
Some for example include a good flogging this would deter most. Community service of some sort of maybe sweeping the streets, debushing areas etc., so the wider society could benefit without necessarily creating a more rounded criminal.