We live today in a world densely populated by human beings living in close commu- nication with one another all over the surface of the planet. Viewed from a certain distance it has the look of a single society, a community, the swarming of an intensely social species trying to figure out ways to become successfully independent. We obvi- ously need, at this stage, to begin the construction of some sort of world civilization. The final worst-case for...