Behave is at once a dazzling tour and a majestic synthesis of the whole science of human behaviour. Brought to life through simple language, engaging stories and irreverent wit, it offers the fullest picture yet of the origins of tribalism and xenophobia, hierarchy and competition, morality and free will, war and peace. Throughout, Sapolsky considers the most important question- what causes acts of aggression or compassion? What inspires us to terrible deeds and what might help foster our best behaviour?