“I had written the sentence, 'You mustn't think that the evolution that gave rise to us was the only evolutionary possibility on this planet. . . . that cultural developments could be shaped through the mediation of another animal species. If the biological conditions were favorable, some civilization not inferior to our own could arise in the depths of the sea. . . . Would it do the same stupid things mankind has done? Would it invite the same historical calamities? What would we say if some animal other than man declared that its education and its numbers gave it the sole right to occupy the entire world and hold sway over all creation?”