To clarify, I'm not trying to argue definitively that these traits are all genetic vs. acquired by watching one's parents. Perhaps it's some mix, though mostly-

To clarify, I'm not trying to argue definitively that these traits are all genetic vs. acquired by watching one's parents. Perhaps it's some mix, though mostly-genetic seems likely to me. I _am_ trying to say that often the traits run in families, which argues against external causes such as vaccines and chemicals.