Restorative Justice is a philosophy for dealing with conflict.
Primarily it rejects the idea that punishment (pain) is or has been an effective way to deal with harm in our communities. Instead it is based on the idea that "offenders" "victims" and the community need to be actively engaged in making amends and meeting the needs of all parties involved in the situation.
Primarily this involves an active accountability and an act of apology.
For a more detailed discussion follow to blog post RJ 101.