You’ve probably heard of the “butterfly effect.” This is a famous proposition of chaos theory, which says that when a butterfly flaps its wings in South America, it can set off a chain of events that ends up causing a typhoon in Southeast Asia. The truth is, you create your own butterfly effect, whether you know it or not, and you do it all the time. One of my favorite butterfly-effect stories is the film It’s a Wonderful Life. A small-town businessman named George Bailey reaches the edge of despair, and decides his life has no meaning and makes no difference. On the brink of suicide, he’s
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