“The human brain evolved in an environment that was local and linear. Local, meaning most everything that we interacted with was less than a day’s walk away. Linear, meaning the rate of change was exceptionally slow. Your great-great-great-grandfather’s life was roughly the same as his great-great-grandson’s life. But now we live in a world that is global and exponential. Global, meaning if it happens on the other side of the planet, we hear about it seconds later (and our computers hear about it only milliseconds later). Exponential, meanwhile, refers to today’s blitzkrieg speed of development. Forget about the difference between generations, currently mere months can bring a revolution. Yet our brain—which hasn’t really had a hardware update in two hundred thousand years—wasn’t designed for this scale or speed. And if we struggle to track the growth of singular innovations, we’re downright helpless in the face of converging ones. Put it this way, in “The Law of Accelerating Returns,” Ray Kurzweil did the math and found that we’re going to experience twenty thousand years of technological change over the next one hundred years. Essentially, we’re going from the birth of agriculture to the birth of the internet twice in the next century. This means paradigm-shifting, game-changing, nothing-is-ever-the-same-again breakthroughs—such as affordable aerial ridesharing—will not be an occasional affair. They’ll be happening all the time. It means, of course, that flying cars are just the beginning.”