Why do emotions feel automatic and uncontrollable? Does rational thought really control emotion? How does emotion affect disease? How can you make your children more emotionally intelligent? Today, the science of emotion is in the midst of a revolution on par with the discovery of relativity in physics and natural selection in biology — and this paradigm shift has immense implications for us all. Leading the charge is psychologist and neuroscientist Lisa Feldman Barrett, whose theory of emotion is driving a deeper understanding of the mind and brain, and shedding new light on what it means to be human. Her research overturns the widely held belief that emotions live in distinct parts of the brain and are universally expressed and recognized. Instead, she has shown that emotion is constructed in the moment, by core systems that interact across the whole brain, aided by a lifetime of learning.