An overcrowded world is the ideal place in which to be lonely. - Brian Aldiss

My shorter definition of SF (is) Hubris clobbered by nemesis.

Perhaps the first fire, the first tool, the first wheel, the first carving in a limestone cave, had each possessed a symbolic rather than a practical value, had each been pressed to serve distortion rather than reality. It was a sort of madness that had driven man from his humble sites on the edges of the woods into towns and cities, into arts and wars, into religious crusades, into martyrdom and prostitution, into dyspepsia and fasting, into love and hatred, into this present cul-de-sac; it had all come about in pursuit of symbols. In the beginning was the symbol, and darkness was over the face of the Earth.

Frank's chromosome conquered everywhere. Peace was guaranteed.
By the end of another century's ruthless intermarriage, Russia and Asia were engulfed as thoroughly as Europe, and by the same loving methods. Billions of people: one consciousness.