Really disappointed in this for how it fails to address sensitivity and neurodiversity with any nuance (despite mentioning both, but only in passing and with broad generalizations). In Cain's presentation, the ideas of introversion and extroversion are little more than personality traits determined in a casual online quiz. Even ambiversion, which she acknowledges in the promising intro chapter, gets forgotten in the rest of the book, which sets up two extremes in seemingly antagonistic opposition.