After many years spent in wars and struggle, mankind had achieved a perfect civilization. But this Utopia was going directly against the adaptive strain Nature had developed. In earlier times, the human body had been keyed to respond to every emergency. Now it was trying to find a new form of excitation in order to maintain its equilibrium, was seeking to tear down that perfect structure... So mankind's rulers built the Arbiter, an artificial intelligence created from the brains of twelve men and women, who had sacrificed their lives for the greater good. The pooled intelligence of the Arbiter's twelve artificial brains would work in unison to provide a common answer, to be the impartial judge of humanity's future actions. Such was the theory...but the Rule of the Brains threatened to destroy humanity itself! Four classic SF tales from the pulp era!