"It was a good start we made in interstellar exploration, but it didn't last very long. We wanted to associate with our cultural peers, and there weren't any. We didn't attempt to make any contact with the primitive races we found. We felt that there would be no point in doing so. Tharnar possessed the highest—and the only—civilization in all the explored regions of the galaxy and younger races had nothing to offer us.
"The time came when no more exploration ships were sent out. We retired to Tharnar and Vendal and surrounded them with a robot-operated fleet, to keep out the inferior races when they finally did learn how to build spaceships. We devoted ourselves to our social culture and became imbued with self-satisfaction, with the assurance that we of Tharnar possessed the full flowering of culture and progress. We withdrew into a shell of complacency and each generation lived out its life with comfortable, methodical, sameness. And our robot-operated fleet was on guard to prevent any other race from annoying us, from disturbing us in the wisdom and serenity of our way of life.
"Fifteen thousand years ago, the last of us on Vendal returned to the more ideal world of Tharnar. And there was plenty of room for them on Tharnar by then. The population had been decreasing for thousands of years—it's decreasing right now. Women don't want to have children anymore—it's an inconvenience for them. They want comfort; the full stomach, the soft couch, the attention of their robots. And men are the same.
"There is no longer any incentive for living on Tharnar other than to duplicate the lives of our ancestors. There is nothing new, nothing to be done that has not already been done better. So we lapse into an existence of placid satisfaction with the status quo—we vegetate. We're like plants that have been seeded in the same field for so many centuries that the fertility of the soil is exhausted. This barren field in which we grow is our own form of culture.
"Do you see what the ultimate end will have to be, Vor?"
He had thought old Vor-Dergal would reply with a heated defense of Tharnarian civilization, but he did not. Instead, he said, "If the present trend continues, there will come a time when there will be more robots in the guard ships than there will be Tharnarians for them to guard. But is the other better, the destruction at the hands of the barbarians?"
"Destruction? It's within their power to destroy us, but why should they? It will be unpleasant for many Tharnarians to contemplate, but an unbiased study of the Terrans shows that they would not want the things we have on Tharnar and in the City; that they would not consider Tharnar and the City worth the trouble of conquest."
"A conjecture," Vor-Dergal said. "And, even if you are right and the Terrans never come to destroy us—what have we to gain by taking this risk?"
"New life. We've been too long in the barren field of our own culture. We've lost our curiosity, our desire to learn, our sense of humor that would permit us to make honest self-evaluations, our pride and courage. And in losing these things, we lost our racial urge to survive.
"Look at the City this morning, Vor. See how slowly it moves; listen to how still it is for a city that contains almost a million people. Do you know what this day is for the City? It's one more act, to be added to all the thousands of acts in the past, in the City's rehearsal for extinction.