In this episode of Crash Course Big History, John Green and Hank Green explore the Modern Revolution, a period of dramatic acceleration in human collective learning and complexity. The video defines the "modern" era, distinguishing between the Early Modern period (starting c. 1500) and the full Modern period (c. 1750), while analyzing the pivotal role of global unification. It details how the connecting of the four isolated world zones led to the exchange of goods, ideas, and crops, but also to horrific consequences like the trans-Atlantic slave trade and the devastation of indigenous populations by disease. The narrative then shifts to the Industrial Revolution, examining why it began in Great Britain rather than China. The hosts discuss the transition from muscle and wind power to fossil fuels, comparing this cultural explosion of innovation to the biological Cambrian Explosion. Key concepts such as the "Anthropocene" and the exponential rise in human complexity are introduced, framing human history within a cosmic perspective. This video is an excellent resource for World History, Geography, and Science classrooms. It helps students understand the interconnectedness of historical events, challenging Eurocentric narratives by highlighting global contributions to industrialization (such as Chinese gunpowder and Islamic mathematics). Teachers can use this to spark discussions on historical causality, the ethics of progress, and the environmental impact of human advancement.