Despite ample evidence and countless testaments to the opposite, there persists a toxic cultural mythology that creative and intellectual excellence comes from a passive gift bestowed upon the fortunate few by the gods of genius, rather than being the product of the active application and consistent cultivation of skill. So what might the root of that stubborn fallacy be? Childhood and upbringing, it turns out, might have a lot to do. In The Examined Life: How We Lose and Find…