Throughout history, every age has thought of itself as more knowledgeable than the last. In today’s hyperconnected world, seemingly limitless information is available on demand. But what about the knowledge lost over the centuries? Are we really any less ignorant than our ancestors? In this highly original account, Peter Burke examines the long history of humanity’s ignorance across religion and science, war and politics, business, and catastrophes. The result is a lively exploration of human knowledge across the ages, and the importance of recognizing its limits.