Nobody is ever born with bipolar disorder. It starts usually in adolescence when people start having their own minds and especially sensitive people go through traumas because of the unnatural lives we`re living and our lack of true freedom. Even footy players are living in a cage, but some of them are more sensitive than others.
Mainstream medicine has only one purpose: to treat symptoms and fool people into peace with the system.
I would bet my bottom dollar that bipolar disorder does not exist in natural, self-reliant aboriginal communities. It all comes with the alienation caused by education, jobs and the lot.
I would take that bet, depression runs in family as does Schizophrenia. Currently 1% of the population has schizophrenia, if both your parents have the illness this increases your chances to 46%. I think their could be a genetic link.... I am not sure on the statistics for Bipolar. I also know a person in my class who has a son that was diagnosed with Bipolar at 3 years old and displayed symptoms of it his whole life at the age of 17.
Mental illness goes back a long time, the first hospital dedicated to mental illness dates back to the 1300's I believe.
The communities that you are talking about actually have better recovery rates than our own for Schizophrenia, recovery from mental illness is not always not having symptoms but living well with them.
Stress is a big cause of mental illness, I agree with you here, however often stress opens the door for mental illness to manifest its ugly head.
Currently we live in an age that has never seen a higher rate of depression their are lots of reasons behind this.
Discussing it would cause a violent discussion I think.