Are there still some countries in the world today that still practice medieval medicine? Even in US? Where science cannot explain the cause of the mental illness? Where people believe person is a weak character, immoral or possessed by evil spirits? Where doctors and scientists cannot explain the cause of it and what is going on? And the person should be locked up in mental hospital, exorcism done on him or her or hole cut in the person brain to allow evil spirits out or worse burning at the stake? May be ADHD, phobia, anxiety, obsessive compulsive, social deviant, antisocial personality disorder, alcoholism, addiction, drug addiction, manic personality to name some. Where scientists cannot explain the cause of it and what is going on. Why some people get it and not other people and what cause it. Where some countries and groups like in say deep south in US like Tennessee, Mississippi or Alabama turn to weak character, immoral or possessed by evil spirits as answer to it? If so what can science do in this case? Where what is on DSM book cannot explain the cause of some mental illness and people turn to medieval medicine for answer? Still goes on today even in the US. If so what can science do in this case? Some people say despite billions dollars put into psychology that they cannot explain some of the mental illness.