“To replace wiring diagrams, Marcus suggests a better analogy: The brain is like a book, the first draft of which is written by the genes during fetal development. No chapters are complete at birth, and some are just rough outlines waiting to be filled in during childhood. But not a single chapter – be it on sexuality, language, food preferences, or morality – consists of blank pages on which a society can inscribe any conceivable set of words.”
