Roughly 30,000 years ago, something incredible happened, changing the world forever: an ape-like creature painted a story onto a cave wall. This became the most important invention for that species. It enabled education, science, therapy, politics, religion, ambition, and innumerable forms of entertainment. So while other humanoid apes passed into extinction, this kind-- homo sapiens --adapted and rose to lordship over the planet. Whether you're telling...