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"Across the world, Hari found social scientists who were uncovering evidence that depression and anxiety are not caused by a chemical imbalance in our brains. In fact, they [believe they] are largely caused by key problems with the way we live today. Hari's journey took him from a ... series of experiments in Baltimore, to an Amish community in Indiana, to an uprising in Berlin. Once he had uncovered [what he argues are] nine real causes of depression and anxiety, they led him to scientists who are discovering seven very different solutions"--Amazon.com.