Spread a viral thought of peace.
I believe one way to create peace in a society is to evolve retaliation in a society into something else.
In other words, teach a (wo)man to teach how to fish - or rather, teach how to stop retaliation - and teach how to teach different kinds of people to stop retaliation.
If we can evolve retaliation into a learning experience for everyone involved in the matter at hand, instead of a violent or otherwise harmful act, I believe this will solve more problems than it creates; But there are some problems:
What preventative measures can we take to stop the retaliatee from taking advantage of the non-retaliation?
How do we prevent society from becoming weak, physically and mentally?
What other potential issues does removing retaliation from society cause?
Is removing retaliation from society even necessary? Why? / Why not?