Lisa Feldman Barrett
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- Carter, III, Albert Howard
Summary:This engaging and informative book describes the latest scientific understanding of the brain, primarily in humans, but also in other animals. The author, a leading brain researcher, writes clearly and often with humor.
As Barrett explores the deep history of brains, she emphasizes that as much as some humans may prize thinking, the brain’s central task is not thinking but monitoring and guiding—day and night—the many systems of the body. Brains of all creatures manage a “budget” for various factors such as water, salt, glucose, blood gases, etc., to create an on-going fitness against any future threats.
Our brains and bodies are interlinked, interactive, and unified, not the “triune” brain Carl Sagan popularized in 1977. All animal brains have similar neurons, and all mammals share a “single manufacturing plan” for brain development after birth. Babies’ brains develop according to their genes and in response to their environment, especially to their caregivers. Human brains have flexible networks much like the global air-travel system and can vary from person to person and, individually, over time because of brain plasticity.
Our individual brains influence—even create—our perceptions and relate to brains of other people through family, language, gesture, culture, and more. Barrett concludes, “Social reality is a superpower that emerges from an ensemble of human brains. It gives us the possibility to chart our own destiny and even influence the evolution of our species” (p. 123).