Research has shown that childhood trauma puts people at risk for non coping behaviours and mental/personality disorders of all kinds.
I don't disagree that childhood trauma can play a part, but I don't think that is valid for all mood/personality disorders.
Head trauma, from accident or other, can also be a factor. Or it can be how the person's brain is wired from birth.
We know that there are risk factors, but we still don't know enough. Also, an illness can come from different sources.
Chicken or egg - is the cause biologically genetic, or purely environmentally triggered?
I suspect both
Who knows? The only thing we seem to be able to spot is that stress, a lot of it can lead to MLC and if not all, most of our MLCer were under a lot of stress at BD.
RCR and HB did not went the biology/neurobiology route. They are more in tune with psycology, psychoanalysis and development stages. Even if, at least RCR, acknowledges and talks a lot about depression.
Each contribution is useful and allows for debate.
Sometimes good things fall apart so better things can fall together. (Marilyn Monroe)