Wondering....? The brother of my maternal g-grandfather ended up in insane institution. Haven't done any research on insanity per se [yet] and there seem to be no other known instances in this family line...[that's not to say that I don't have my share of crazy relatives]....Has anyone done any research on the genetics of this? Is it primarily considered environmental and stress related.....or are there several types of insanity and multiple causal factors? Guess I'm not asking a simple yes or no type question, but perhaps someone out there has some references for the layperson to peruse? Thanks for suggestions......connie