Herman Bucki
Herman Bucki voted up Ray Dart's answer

I contributed on a very similar question here about 5 years ago. I'm not an expert (my sister probably is, I might ask her). I do remember an article in Nature magazine about 15 years ago that  suggested it was 90% nature and 10% nurture. I believe that data was supported by studies using separated … Read more

Herman Bucki
Herman Bucki voted up Anonymous' answer

That's okay. You do your paper- I I already did mine on this topic  30 years ago.

I will throw a kink in there though -"personality"  has a lot to do with how much of each -nature or nurture  -is absorbed or affected upon the person.  Your best bet is to study the case studies … Read more