Judith Rich Harris - No Two Alike

No Two Alike

No Two Alike: Human Nature and Human Individuality, was published in February 2006. Harris attempts to explain why people are so different in personality, even identical twins who grow up in the same home.

She proposes that three distinct systems shape personality:

  • A relationship system allows us to distinguish family from strangers and tell individuals apart.
  • A socialization system helps us to become members of a group and absorb the group's culture.
  • A status system enables us to acquire self-knowledge by measuring ourselves against others.

No Two Alike expands on some of the ideas from The Nurture Assumption and attempts to answer some of the criticisms leveled at the former book.

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