Naturally, this form af natural selection is not necessarily guaranteed to be for the good, and wizzes really ought to bear in mind the following extract from "The Encyclopedia of Science Fiction" (Clute & Nicholls, Orbit, 1993, page 275): "... one of the most annoying of SF cliches: the idea that selfish deviants might be harrassed as a kind of test to prove their suitability for recruitment into the social elite of a stable society.".