Pope Francis issued his Message for the World Day of Peace titled, Nonviolence: A Style of Politics for Peace.
Other links include:
Catholic Nonviolence Initiative Affirming the vision and practice of active nonviolence at the heart of the Catholic Church. A project of Pax Christi International.
Peace and non-violence from the Diocese of Rochester
Catholics and Non-Violence from the LaSalette
Gabriel Moran and non-violence from New York University.
Articles from Fr. John Dear on non-violence.
CARFLEO Peace Links
Peace Resources from Pax Christi USA