Last time we explored how language enabled humans to create shared fictions that coordinate millions, giving us power without wisdom while locking us into systems of our own making. Now we confront the intellectual revolution that transformed humanity's relationship with knowledge itself: the Scientific Revolution beginning approximately five hundred years ago, characterized not by new discoveries but by the revolutionary admission of ignorance. Premodern knowledge traditions including Islam, Christianity, Buddhism, and Confucianism all assumed that everything important was already known and preserved in ancient texts or traditions left by great gods, wise men, or past civilizations. Modern science shattered this assumption by proposing that humans do not know the answers to the most important questions, embracing the Latin injunction 'ignoramus'—we do not know. This admission created a fundamentally different approach to knowledge acquisition based on mathematics and empirical observation rather than stories and ancient texts, with scientists describing natural phenomena using mathematical tools and testing theories through systematic experimentation. The author argues this shift represented more than methodological change; it transformed humanity's entire worldview by replacing certainty with perpetual questioning, making ignorance the foundation of progress rather than a shameful gap to be hidden. The willingness to say 'we don't know' paradoxically unleashed unprecedented knowledge accumulation because it freed investigators from defending inherited dogmas and encouraged systematic observation of the natural world. This intellectual humility combined with mathematical precision created a self-correcting system where theories could be tested, refined, or discarded based on evidence rather than authority. The Scientific Revolution's most profound impact came through its marriage with empire and capitalism, creating an unprecedented feedback loop where scientific research required funding from empires and capitalists who expected practical returns in new technologies and economic growth. European imperial expansion became inextricably linked with scientific advancement, exemplified by Captain James Cook's Pacific voyages from 1768 to 1779, which were fundamentally different from earlier expeditions because they were explicitly scientific missions carrying astronomers, botanists, and other scientists whose primary purpose was gathering new knowledge. The author contrasts this with earlier Chinese expeditions under Admiral Zheng He from 1405 to 1433, which were massive displays of imperial power but generated little scientific knowledge because they operated under the assumption that China already possessed all important knowledge. This science-empire-capitalism nexus transformed global power structures in profound ways, with European imperial conquests justified and facilitated by scientific knowledge including better maps, understanding of winds and currents, knowledge of local diseases, and anthropological insights into indigenous societies. The admission of ignorance thus became a source of power rather than weakness, driving exploration, experimentation, and technological innovation that reshaped the modern world. The author concludes that understanding this revolution requires recognizing how intellectual humility paradoxically generated unprecedented confidence in humanity's ability to solve problems through systematic investigation, creating the foundation for all subsequent scientific and technological progress that defines contemporary civilization.