You might be tempted to try to make decisions in your life based on what you know has happened in the past or what has happened to other people. You should learn all that you can from the past; from scholars who have studied it, and from people who have gone through problems of the sort that you are likely to face. But this doesn’t solve the fundamental challenge of what information and what advice you should accept, and which you should ignore as you embark into the future. Instead, using robust theory to predict what will happen has a much greater chance of success. The theories in this book
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