Lost connections
Lost connections by Johann Hari is a 2018 Personal Development book written by TED speaker Johann Hari, paired here with the talk they gave.
"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.