21 Lessons for the 21st Century

by Yuval Noah Harari

In the late twentieth century democracies usually outperformed dictatorships because democracies were better at data processing. A democracy diffuses the power to process information and make decisions among many people and institutions, whereas a dictatorship concentrates information and power in one place. Given twentieth-century technology, it was inefficient to concentrate too much information and power in one place. Nobody had the ability to process all the information fast enough and make the right decisions. This is part of the reason the Soviet Union made far worse decisions than the United States, and why the Soviet economy lagged far behind the American economy. However, soon AI might swing the pendulum in the opposite direction. AI makes it possible to process enormous amounts of information centrally. In fact, AI might make centralized systems far more efficient than diffused systems, because machine learning works better the more information it can analyze. If you disregard all privacy concerns and concentrate all the information relating to a billion people in one database, you can train much better algorithms than if you respect individual privacy and have in your database only partial information on a million people.