John welcomes author Sebastian Mallaby to discuss his new bestselling book, “The Infinity Machine: Demis Hassabis, DeepMind, and the Quest for Superintelligence.” Mallaby explains why Hassabis, the leader of Google’s efforts in artificial intelligence, remains an obscure and under-covered figure compared with Sam Altman, Dario Amodei, and Elon Musk, the poster boys of the A.I. revolution; why, despite his relative public obscurity, Hassabis may prove more important in shaping our future than any of them; and whether he is, at bottom, the kind of person we should comfortable entrusting with such power.