Imagine a world in which anyone with a $20,000 desktop DNA synthesizer could develop and unleash a deadly virus. Imagine an undetectable deepfake video of a U.S. president making a racial slur racing across the internet on the eve of an election. A cofounder of the pioneering AI company DeepMind issues an urgent warning of the risks that a wave of fast-developing technologies poses to global order-and how our window to contain them is rapidly closing. About a very urgent global issue.