One theory which can no longer be taken very seriously is that UFOs are interstellar spaceships.

Now times had changed, and the inherited wisdom of the past had become folly.

There were some things that only time could cure. Evil men could be destroyed, but nothing could be done with good men who were deluded.

. . . Moon-Watcher felt the first faint twinges of a new and potent emotion. It was a vague and diffuse sense of envy--of dissatisfaction with his life. He had no idea of its cause, still less of its cure; but discontent had come into his soul, and he had taken one small step toward humanity.

One of the biggest roles of science fiction is to prepare people to accept the future without pain and to encourage a flexibility of the mind. Politicians should read science fiction, not westerns and detective stories.

I don't pretend we have all the answers. But the questions are certainly worth thinking about.

Isaac Asimov is, in reality, based on something I had invented a few years previously.