Forgiveness is a personnal mean to get read of unuseful to auto-destructive bad feelings.
But it is not necessary as a tool for all people to use.
In the justice system, reparation can be payment for a crime without forgiveness. A jury or a judge cannot enact forgiveness, a society cannot really even enact forgiveness, but each can demand reparation. It is perhaps the duty of a society or jury to apply justice by means of reparation in some way - imprisonment, humility, financially - but it is not the duty of society to determine forgiveness. I do not see forgiveness as being necessary to apply justice to someone. sammieswife.
Who said that it is necessary (as if you have to absolutely) ? Who said it's the duty of society to determine forgiveness (as if it was a law) ?... It's a personnal choice/tool for our own relief (you chose to, nobody can help you about that) ... Also to forgive do not imply no justice ... if for instance somebody have to go to jail it is not because you forgive that he does not have to go to jail (again there is a mixe here in between to forgive and to have somebody to pay a bill). Also it is not because you forgive a so called friend who hurted you for instance, that he/she can be your friend again (you choose - regarding to what it is all about).