A new study of 1,024 mammal species has determined which animals are the most vicious killers of their own kind. Killer whales perhaps? Pit bulls maybe? For the answer, just look in the mirror.
A surprising outcome of my four-year investigation into the neuroscience of human aggression for my new book Why We Snap, was how the reductionist approach that I took to understand individual violent behavior in terms of the specific neural circuits responsible, exploded in scope to illuminate human aggressive behavior in mass–between groups of people, from gangs to races to nations at war. Brexit is a recent example.