Dr Seligman (credentials:
Martin Seligman - Wikipedia, the free encyclopedia) states that in the history of mental illness, only 14 are treatable, and only 2 are curable. the DSM-IV lists over 350 mental disorders. And their definition of mental disorder in their introduction is very dubious. The DSM is a great work of fiction.
Do not get confused in the linguistics. Mental disorder is not a disease. No amount of behaviors used as diagnostic criteria in DSM can ever be a disease. You can fake a mental disorder, but you cannot fake a disease. Why? objective tests.
During slavery, drapetomania was a valid psychological diagnosis. Drapetomania was a mental disorder that made slave run away from their owners.
I take the viewpoint of Albert Ellis and his REBT. It's one's belief system that changes behaviors. And all mental illnesses are based on diagnosing behaviors. No drugs needed, just change your beliefs. The concept is that simple, but it's hard to do. This is life.
"There is no such thing as mental illness, only varying degrees of irresponsibility" - Thomas Szasz
Clinical depression is a marketing term used by pharmaceuticals to push sales of their drugs. Psychologists will agree that there is absolutely no solid scientific evidence of mental disorders and they cannot explain why a 'disorder' is found in the population in excess of 5%. I read numbers from 20-60%.
If you need the drugs, you can get them. They can help to stop a terminal episodes like suicide by short circuiting the brain. Then ask, what does a successful depression treatment/cure look like? If you're going to fight, it's best to know what you're fighting.