Marbles in a Sink There’s an exercise I like to use when looking for ideas that will end up governing the course of history, especially when it comes to technology. Let’s imagine a sink, and you throw a handful of small marbles into it. At first, there’s absolute chaos as the balls collide with each other and roll all around the sink. But every now and then, one ball goes down the drain, and then another, and eventually, the marbles settle down and start streaming down the drain in an unstopp...