The Incan Empire did not simply fall; it was hollowed out by a biological apocalypse and a fratricidal civil war before the first Spaniard ever set foot in its mountains. Professor Sebastian Hale explores the terrifying convergence of Francisco Pizarro’s ruthless ambition and the structural vulnerabilities of a civilization that lacked the wheel but mastered the mountains. Witness how 168 men exploited the internal rot of an empire stretching 2,500 miles, turning a moment of curiosity into a world-historical tragedy.