The ability to refashion the human genome was a truly incredible power, one that could be devastating if it fell into the wrong hands. The thought frightened me even more because, by this point, CRISPR had been widely disseminated to users around the globe. Tens of thousands of CRISPR-related tools had already been shipped to dozens of countries, and the knowledge and protocols needed to create designer mutations in mammals—at least in mice and monkeys—had been described in great detail in numerous published articles.
