"As he was thousands of years ago, man will again become a fairly rare animal, probably a nomadic one. Towns may still exist in places of unusual beauty or historic importance, but most homes will be self-contained and completely mobile, relocatable to any spot within hours. The continents will have reverted to wilderness; a rich variety of life forms will return." Huh? Who programmed these uber-gaia machines? How does [he] know that all artificial life will come with the soul of a Greenpeace activist built in? I enjoy reading Jon Katz' work, but it would be so much better if he would just focus focus focus on the topic at hand rather than running everything through a better-living-with-technology / politicians-are-stupid filter.