Focusing mainly on philosophical rather than safety concerns, the authors discussed what it meant to be human, to pursue happiness, to respect nature’s gifts, and to accept the given. It argued the case, or more accurately it preached the case, that going too far to alter what is “natural” was hubristic and endangered our individual essence. “We want better children—but not by turning procreation into manufacture or by altering their brains to gain them an edge over their peers,” they wrote. “We want to perform better in the activities of life—but not by becoming mere creatures of our chemists
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