Rising rates of depression and anxiety in wealthy countries may be a result of our brains getting hooked on the neurotransmitter associated with pleasure, Anna Lembke reports in a Wall Street Journal article. A patient of hers, a young man in his early 20s, came to see her for debilitating anxiety and depression. He had dropped out of college and was living with his parents. He was vaguely contemplating suicide. He was playing video games most of every day and late into every nig