Corrections in red.  Suggested sylistic changes in blue.

Prison system, just some ideas=))))

Nowadays there is no unanimous opinion as to the advantages and disadvantages of the current prison system. It is really difficult to determine which point of view is correct and well thought-out. "So many men, so many minds" – as the saying goes. 

On the one hand, imprisonment is the best solution to punish criminals, to restore justice and to isolate delinquents from law-abiding citizens. It is true that the evil must not go unpunished, and we always get what we deserve. Yet on the other hand, the main aim of the imprisonment is not a punishment, but the re-education of offenders. It is a so-called “school” where the criminals are taught how to become normal people and how to lead a decent life in a human society. Unfortunately, not everywhere is this fact is taken into consideration; and in many prisons people live according to the law of the jungle.
In any event, the fact remains though that imprisonment allows victims to feel safe and, to some extent, even satisfied. It is a psychological phenomenon of being sure that your offender is punished and will not hurt you anymore. And speaking about people whose relatives or friends have been killed, the imprisonment of perpetrators is a small moral compensation for them. Yet it would be a mistake to overlook the fact that sometimes the imprisonment is a very high price to pay for one's crimes.  Everyone makes mistakes, then repents and has a chance to be forgiven. It is really important to remember that we are humans, not animals.
Some people claim that imprisonment will prevent other people from committing crimes, because it is a striking example of the popular belief that the good always defeats the evil. But is it not, at the same time, a telling illustration of cruelty, abuse of authority, and inhumanity? It is hard to dispute the fact that the way some criminals are treated in prisons leaves much to be desired.
All in all, this question is rather controversial and will remain a matter of dispute for a long time. Yet one thing remains a universal truth: we should always remain people, whatever happens.

I don't always agree what you say, but you certainly state your beliefs in excellent English.