By 2500, the city around Larry must have reached its height. It stayed there a half century; and then it began coming down. Its degeneration was slow, in the beginning. First, there might have been a hole in the arcade which was not repaired. Then others would appear, as the neglect spread. The population left. The great buildings of metal and stone, so solidly appearing to the brief lifetime of a single individual, were impermanent over the centuries. By 2600, the gigantic ghosts had all melted down. They lay in a shadowy pile, burying the speeding cage. There was no stopping here; there was no space unoccupied in which they could stop. Larry could see only the tangled spectres of broken, rusting, rotting metal and stone. He wondered what could have done it. A storm of nature? Or had mankind strangely turned decadent, and rushed back in a hundred years or so to savagery? It could not have been the latter, because very soon the ruins were moving away: the people were clearing the city site for something new. For fifty years it went on. * * * * * Tina explained it. The age of steam had started the great city of New York, and others like it, into its monstrous congestion of human activity. There was steam for power and steam for slow transportation by railroads and surface ships. Then the conquest of the air, and the transportation of power by electricity, gradually changed things. But man was slow to realize his possibilities. Even in 1930, all the new elements existed; but the great cities grew monstrous of their own momentum. Business went to the cities because the people were there; workers flocked in because the work was there to call them. But soon the time came when the monster city was too unwieldy. The traffic, the drainage, the water supply could not cope with conditions. Still, man struggled on. The workers were mere automatons--pallid attendants of machinery; people living in a world of beauty who never had seen it; who knew of nothing but the city arcades where the sun never shone and where amusements were as artificial as the light and air. Then man awakened to his folly. Disease broke out in New York City in 2551, and in a month swept eight million people into death. The cities were proclaimed impractical, unsafe. And suddenly the people realized how greatly they hated the city; how strangely beautiful the world could be in the fashion God created it.... There was, over the next fifty years, an exodus to the rural sections. Food was produced more cheaply, largely because it was produced more abundantly. Man found his wants suddenly simplified.