The effort to destroy facts and make America ungovernable didn't come out of nowhere. It is the culmination of seventy years of strategic denialism. In On Disinformation, Lee McIntyre shows how the war on facts began, and how ordinary citizens can fight back against the scourge of disinformation that is now threatening the very fabric of our society. Drawing on his twenty years of experience as a scholar of science denial, McIntyre explains how autocrats wield disinformation to manipulate a populace and deny obvious realities, why the best way to combat disinformation is to disrupt its spread, and most importantly, how we can win the war on truth. McIntyre goes through the history of strategic denialism to show how we arrived at this precarious political moment and identifies the creators, amplifiers, and believers of disinformation. On Disinformation lays out ten everyday practical steps that we can take as ordinary citizens--from resisting polarization to pressuring our Congresspeople to regulate social media--as well as the important steps our government (if we elect the right leaders) must take. On Disinformation empowers us to save our republic from autocracy before it is too late.