Peace always begins within each of us. Our ability to create in the world depends on our ability, first, to work to create peace in our own lives. It's much easier to advocate peace on Earth than it is to be able to bring peace your own home. Or your own heart.
When one views the planet Earth from outer space and sees no national boundaries, the prophecy of Teilhard de Chardin is compelling:
The age of nations is past. That task before us, if we would not perish, is to build the earth ... to help hear her wounds.