The worldwide prominence of snakes in religion, myth, and folklore underscores our deep connection to the serpent - but why, when so few of us have firsthand experience? The surprising answer, this book suggests, lies in the singular impact of snakes on primate evolution. Predation pressure from snakes, Lynne Isbell tells us, is ultimately responsible for the superior vision and large brains of primates - and for a critical aspect of human evolution.