Failure analysis approach: understand mental illness by examining breakdowns in functioning, mental disorder does not have a clear cut definition. Ex: laziness is not a disorder but effects your mental performance. Demonic model: thought mental disorders were evil spirits, trepanning- drill holes in skulls to release demons, prevented people from disclosing they had mental disorder. Medical model: saw it as physical illness and required treatment, insane asylums- isolate them from society, treated like animals. Moral treatment: treated them like people, actually get better, not enough for the severe mental disorders though, until creation of drugs to treat disorders like schizophrenia. People able to leave asylums and enter society again. But can"t force people to take medication, doesn"t work for everyone. Generalized anxiety disorder: most common, affects 3rd of population after major life change, stressor, constant symptoms: insomnia, panic attacks, sweating, physical tension.