New biomedical technologies — from prenatal testing to gene editing techniques — raise questions about how far we should go in retooling the human genome. Two leading thinkers, George Estreich (“Fables and Futures: Biotechnology, Disability, and the Stories We Tell Ourselves,”) and Jamie Metzl (“Hacking Darwin: Genetic Engineering and the Future of Humanity”) explore these new frontiers — and their limits. Sponsored by Berkeleyside.