Having just been listening to the news about riots etc, the following by Lao Tse came to mind (6th-century BC):
If there is to be peace in the world
There must be peace in the nations.
If there is to be peace in the nations
There must be peace in the cities.
If there is to be peace in the cities
There must be peace between neighbours.
If there is to be peace between neighbours
There must be peace in the home.
If there is to be peace in the home
There must be peace in the heart.
