An exploration of some of the most important and enduring ideas in human history—from religion, science, philosophy, medicine, psychology, politics, economics and art—each presented in brief, accessible form. "Big" ideas are those concepts and theories that have radically transformed our understanding of the world we live in, our place in that world and the ways we have shaped the past and will shape the future. Topics covered range widely and include Creation Mythology, Existentialism, The Elements, Relativity, Space Travel, Geometry, Ethics, Behaviourism, Genetics, Warfare, The Nation State, Anarchism, Capitalism, Classical Art and Architecture, The Renaissance—and much more.