"You're awakening a dragon. Public anger is stirring." A warning from Rutger Bregman to Silicon Valley. The historian is sounding the alarm over the existential risks posed by unrestrained technology and artificial intelligence in his final BBC Reith Lecture. He calls on those in power to assume responsibility, and help shape a future worthy of hope. Bregman envisions 'moral revolutions' as the path forward and urges us all to come together to take on this task. "Small groups of committed citizens have bent the arc of history towards justice. And whatever the outcome, there is beauty in trying, beauty in every act of courage, in every spark of truth."