What's the source of this? Given that siblings are often so different between each other, and from their parents, it could be that most of personality traits come from the environment, but we're still born with it (i.e. it could be influence in early development of the fetus, from the environment (womb, food mother eats and her hormones, sounds and movement from outside, ...) not from genes).
What's the source of this? Given that siblings are often so different between each other, and from their parents, it could be that most of personality traits come from the environment, but we're still born with it (i.e. it could be influence in early development of the fetus, from the environment (womb, food mother eats and her hormones, sounds and movement from outside, ...) not from genes).