Thanks to the plummeting prices of DNA sequencing, wearable devices, massive computing power, and artificial intelligence, we’re moving into a world in which treatment decisions no longer have to be based on what is best for most people most of the time. These technologies are available to some patients now and will be available to most people on the planet in the next couple of decades. That’s going to save millions of lives—and it’s going to extend average healthy lifespans irrespective of whether we extend maximum lifespans.
