Bozenka Ford
Bozenka Ford voted up Walt O'Reagun's answer

Neither ... Or Both ... Depending on your view.

If it was strictly nurture, there wouldn't be examples of people who grow up in affluence turning to crime.

If it was strictly nature, there wouldn't be examples of people turning their life around ... Either from bad to good, or good to bad.

Thus, it's a combination of … Read more

Bozenka Ford
Bozenka Ford 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