...is that one of the factors that sets the stage for later PD involves certain happenings in the womb. These factors also affect our stress response in ways that make many of us "worriers" when viewed from outside. But from inside we (or at least I) view it as "it needs doing right so I better do it". Often we are seen as "driven" or "over achievers" or "serious" or "anxious" etc Actually we are just more comfortable being in charge instead of trusting some other klutz won't screw it up. I bet a Parkie first said "If you want it done right, do it yourself."
So, what many may label "negative thinking" is really because we can't count on bozos like them to do it right. We need tee shirts that say "I'm not negative, it's just that you are incompetent."