『Lost Connections』要約

In *Lost Connections*, journalist Johann Hari challenges the conventional biomedical model of depression and anxiety, arguing that they are not simply chemical imbalances in the brain but responses to genuine disruptions in how we live. Drawing on hundreds of interviews with scientists, psychologists, and people with lived experience, Hari synthesizes research suggesting that disconnection from meaningful work, other people, meaningful values, childhood trauma, status and respect, the natural world, and a hopeful future are major contributors to emotional distress. He pairs each of these "lost connections" with a corresponding reconnection, such as reconnecting to meaningful work or to other people. A distinctive framework in the book is Hari's critique of what he calls the "serotonin story," the widely repeated claim that depression is caused by low serotonin levels. He traces how this narrative became popular and examines evidence questioning its simplicity, while emphasizing that antidepressants can help some people even if the underlying theory is incomplete. The book also explores social prescribing in the UK, the role of community and cooperation in places like Kotti, a housing project in Berlin, and the Baltimore-based research on adverse childhood experiences. Throughout, Hari weaves in his own history of depression and anxiety, including his teenage experience with antidepressants. The result is a blend of investigative reporting, personal memoir, and social critique that reframes mental health as a problem of culture and connection as much as of individual biology.