Preface
_ When a man has a great deal of knowledge, it becomes extremely easy for him to confuse "knowledge" with "wisdom" ... and forget that the antonym of "wisdom" is not "ignorance" but "folly."
FORWARD
_Hardly had man solved his basic problems on the planet of his origin than he began to fumble into space. Barely a century had elapsed in the exploration of the Solar System than he began to grope for the stars._
_And suddenly, with an all but religious zeal, mankind conceived its fantasy dream of populating the galaxy. Never in the history of the race had fervor reached such a peak and held so long. The question of why was seemingly ignored. Millions of Earth-type planets beckoned and with a lemming-like desperation humanity erupted into them._
_But the obstacles were frightening in their magnitude. The planets and satellites of Sol had proven comparatively tractable and those that were suited to man-life were quickly brought under his dominion. But there,

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