A Networked World is a More Random World
By their very nature, networks - of customers, Web sites, weather patterns, evolutionary systems, or economic competitors - are subject to random and unpredictable movements.
Networks of interrelated things, whether we are talking about the Web or a collection of stock and bond prices, often grow in a kind of "cascading" pattern. For instance, because one person buys a stock, others think it must be valuable, too - so they buy it. Influential customers become more influential at a faster rate than those who aren't already influential. The most visited Web sites gain visitors faster than others, and wealthy people become wealthier at a faster rate than others. The reason this kind of cascading occurs is easy to understand, but the effects of cascading like this can be quite random. Cascading means that two systems could be set up with nearly identical initial conditions, but even very slight, almost undetectable differences between them will inevitably escalate into major differences after just a bit of time, creating what has come to be known as the "butterfly effect."
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