As hellish as life was in the primitive factory towns (see Steven Johnson's fine study of early industrial London, The Ghost Map), cities at last have matured into the most ecologically enlightened habitat for a world that numbers billions of human beings. Urban density compacts population and saves the land, its resources, natural beauties, and human lives. Cities are where ideas are exchanged most rapidly and where medical progress is made. Subtract the cars and freeways, condense the suburbs back into urban centers — some large, some small — mix in a good measure of social justice, and we have the best design for living in a world where over 50 percent of the human race now chooses to reside in cities. Eldertown makes all this more possible.