IV2010, whilst I hear what you are saying and its tragic to hear of the suicides in your family. We cannot get away from the fact that suicide is still a choice / a decision. When you say 'it runs in families' it is the behaviour that runs in families. No gene has been found for schizophrenia, which is on the top end of the spectrum of mental disorders. I wonder how much of it is reactional / learnt behaviour. You could argue that alcoholism runs in families, but where is the alcohol gene? There are so many other factors involved.