Conquerors live by conquest; the first failure is a signal for the conquered to rise against them. - Jack Williamson

Horn sat in the near darkness staring at eight floating choices and reflected how inevitability had channeled his actions since he had left the Cluster. Since he had accepted the money from the voice in the darkness, there had been only one step to take, and he had taken it; one path to follow, and he had followed it. Beyond, it had seemed, there would be choice; never now.
So it had let him on, step by step, comforted by the self-nurtured illusion of free will, guided subtly, unyieldingly, by the iron tube of determinism. Once it started, he never had a chance to turn back.

Considering the uses of science fiction, I think it must first of all offer entertainment, before the the futurology or the social comment can matter. For most readers, entertainment means escape. Though a few young writers are scornful of the, creating good escape fiction is a high and admirable art. Even when the writer aims at something more, entertainment is basic. The bored reader is lost.

Horn cut the thought off. That was a metaphysical blind alley. He had to assume the reality of things outside himself; this existence was self-centered enough, and he had no desire to return to the universe-creator illusion.