In this episode, we enter the 20th century - the most violent,inventive, and psychologically revealing period in the history of exchanges. Two world wars shut down trading floors. The greatest economic collapse in modern history forces the invention of regulation. Technology moves from shouted open-outcry pits to blinking computer screens. Globalization accelerates, then stumbles through currency crises and dot-com euphoria. And through it all, the same human impulses we saw in Babylonian clay tablets and Amsterdam coffee houses play out on a planetary scale: hope, fear, greed, panic, and the endless search for stability in chaos.