Over the last several years, conspiracy theories have drawn increasing media attention. From birtherism to QAnon, from pandemic disinformation to lies about the outcome of democratic elections, conspiracy theories have been openly embraced by politicians who seek to use them to influence the electorate. But conspiracy theories are not a recent phenomenon, and neither is their propagation by prominent individuals and organizations that are capable of shaping public discourse. In this series, I will discuss some consequential conspiracy theories, such as the "Stab in the back" conspiracy theory that spread among Germany's far-right circles after World War I, or the false claim by elements of the US far-right that the 2020 Black Lives Matter protests were masterminded by the Chinese government. But, first of all, I will provide a definition of the term conspiracy theory in order to avoid ambiguity and confusion. "Stop The New World Order" by Christian Cable, lic...