When I was a college student in the forties with a major in psychology, the constant argument in that time by the professionals was Nature versus Nurture, heredity versus environment. I was then and still of the opinion that Nature (Heredity) wins out.
The book was fascinating reading and held my interest, so much so that I stayed up very late every night to read it. I usually am in bed by 9:30. It reinforced my opinion that heredity determines ones destiny.