Just because Zenofsong says there is no such thing as Bipolar doesn't mean it's true. But he obviously has some deeper knowledge that no one else has. It is kind of obnoxious to clump his experiences with meditation to making assumptions about other people's mental illness. Which by the way are real. Whether he BELIEVES that or not. That is his opinion only.
As far as your question goes, yes it is possible for bipolar to be inherited through generations. But I am not personally familiar with a whole family being diagnosed. I have seen behavior problems in families that mimic a mental illness or other mood or emotional disorders like Borderline Personality Disorder. Of course it is very easy to blame bad behavior on mental illness, and I am quite sure it happens often.
I can say I am bipolar with a 100 percent accuracy. I have lived it. I have tried MANY things NOT to be bipolar.Including meditation, hypnosis, dialectical behavioral therapy and so on. Sadly I am still bipolar. I am not a spoiled child that can't have her way. I have a real illness that requires medication and therapy to maintain a balance in my life.
A research study done in Sweden suggested that bipolar AND schizophrenia were genetically linked.
There are studies done everyday showing that mental illness is inherited. And that it is real. There is no proof to prove otherwise. And to tell people suffering that there is no such thing is just plain bullying.
Of course it is very possible he has bipolar. Because there is that competent of rage and anger issues. And withdrawing is also a sign, but there are of course many more symptoms and a visit to a psychiatrist before a proper diagnosis can be made.
I struggled for over two years before accepting mine. I went to several doctors, I had a battery of tests, EEG, brain scans and a lot of therapy, several hospitalizations, before I began to realize I had to start a program toward getting well.
Perhaps you, and the wife of this man can have a conversation with this man about seeing someone, such as a therapist, who can recommend a psychiatrist. I hope this helped you a bit. Feel free to write anytime.