Earthman Come Home Author:James Blish Centuries before, when Earth's resources were exhausted, the planet's great cities had one by one cut loose to hurtle off into space. Powered by giant spindizzies, the nomad cities roamed the galaxy in search of food, work, and fresh supplies of the drug which could prolong the human life span to thousands of years. — So it was perhaps inevitable... more » that colonies of rogue cities would revert to the ancient law of Earth's jungles—barbarity, cruelty, and naked forces—to threaten the last stronghold of universal culture and civilized decency.
Now that day had come. Against this destructive force stood one aging, unwarlike city and two men: one young and vigorous, the other 1000 years old.« less