For decades, doctors have classified mental illnesses into distinct categories, like “depression” or “obsessive-compulsive disorder.” But increasingly, psychiatrists are coming to the conclusion that categorizing mental disorders in this way doesn’t work, because the lines between the disorders are far too blurry. How are scientists rethinking the roots of mental illness for a better framework—and better treatment?

Science American explain us more here, on “Roots of Mental Illness –Researchers are beginning to untangle the common biology that links supposedly distinct psychiatric conditions”