"Give me a dozen healthy infants, well informed, and my own specified world to bring them up in and I'll guarantee to take any one at random and train him to become any type of specialist I might select--doctor, lawyer, artist, merchant-chief; and yes, even beggar-man and thief, regardless of his talents, penchants, tendencies, abilities, vocations, and race of his ancestors."
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When it comes to what makes people within the mainstream of a society different from one another — whether they are smarter or duller, nicer or nastier, bolder or shyer — the nature-nurture debate, as it has been played out for millennia, really is over, or ought to be: half the variation is from the genes, little or none from the family, the rest from something else.
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