More than 90 percent of these accidents are caused by very human errors: somebody drinking alcohol and driving, somebody texting a message while driving, somebody falling asleep at the wheel, somebody daydreaming instead of paying attention to the road. The National Highway Traffic Safety Administration estimated in 2012 that 31 percent of fatal crashes in the United States involved alcohol abuse, 30 percent involved speeding, and 21 percent involved distracted drivers.7 Self-driving vehicles will never do any of these things. Though they suffer from their own problems and limitations, and though some accidents are inevitable, replacing all human drivers by computers is expected to reduce deaths and injuries on the road by about 90 percent.8 In other words, switching to autonomous vehicles is likely to save the lives of one million people every year.

21 Lessons for the 21st Century by Yuval Noah Harari