Imagine your least-favorite world leader. (Take as much time as you need.)
Now, imagine if that person wasn’t a human, but a network of millions of computers around the world. This digi-dictator has instant access to every scrap of recorded information about every person who’s ever lived. It can make millions of calculations in a fraction of a second, controls the world’s economy and weapons systems with godlike autonomy and — scariest of all — can never, ever die.