The struggle to defend objective truth against people who consciously choose to deny or distort it has become a fight to defend our society, and democracy itself. The nature of conspiracy theorizing has changed, from relatively harmless speculation about the Bermuda Triangle or Bohemian Grove to sinister theories that place democratic governments at the center of dark plots to control, sicken, and murder their own citizens. These online accusations are now often invented and spread by demagogic leaders around the globe, who use social media platforms to undermine trust in the very institutions that keep the powerful in check—elections and the courts, competing branches of government, and objective journalism. These political opportunists play to constituencies willing to relinquish objective truth for attractive, fantastical Deep State schemes in which political opponents are pedophiles and satanists, and society’s most vulnerable morph into villains deserving vigilante justice.