My dad, now 83, is diagnosed as a patient of Paranoid Schizo (by a doctor) and bipolar disorder (by another Doctor) around 8 years back. Both Doctors pointed (of couse verbally), that it developed at least 45 years back, then.
However, earlier, we always thought it as an attitudinal problem on his part. Our family is always the worst sufferer of his atitudinal problems and it is growing with his age. This is just a part of the story.
I have been sincerely observing his movements closely, since my childhood, but, I am not very sure about his childhood history as such. However, I am confident, that, her mother (i.e. my grand mother) was a saddist. In fact, one of my Aunt, had to commit suicide because of her cruelty. Even, after that, she continued with her cruel atitude with my mother too. In addition, other senior members of our (Joint) family, then, too involved in hostile activities against my mother.
I am not denying the possibility, that my mother may be at fault. But, possibly, this is not tbe case. As, Similar (like my grand mother), atitudinal ( or eccentric) problem was prevalent in my aunt (My fathers sister), who sued her son on some pretty issue. The above (few) case histories makes me confident that immediate seniors of my father had atitudinal problem and possibly his problems or disorders or eccentrity could be rooted in his case history.