With any disease whether mental or physical it is dependent on both genetics and environment.
Just through experience I think it is more likely from bad experiences, abuse neglect. Sometimes it's genetic but I think more so all the bad shirt that can happen in life is what's gets you there
It depends on Whom does the observing.Behavioral science would have you believe that it is all genetics. Like having a hammer,everyone becomes a nail. Bad thing do really happen to people. The scientists see only their chemical hammer, there by making a bad situation worse. Behavioral science is first and foremost a business!
You are welcome! I've been there.
Both, because experience.
I think it can be both
I think both, two people could go through the same experience, and turn out different. I think genetics cause people to be affected by environment differently.