Michael Butter is a professor of American Studies at the University of Tübingen in Germany, co-editor of the Handbook of Conspiracy Theories (Routledge, 2020) and PI of the ERC-funded project "PACT: Populism and Conspiracy Theory."

Katerina Hatzikidi is a social anthropologist and postdoctoral researcher for the "PACT: Populism and Conspiracy Theory" project.

Constanze Jeitler is a Ph.D. candidate at the Institute for Contemporary History at the University of Tübingen, Germany, and part of the "PACT: Populism and Conspiracy Theory" research project.

Giacomo Loperfido is a social and political anthropologist and postdoctoral researcher for the "PACT: Populism and Conspiracy Theory" project.

Lili Turza is a Ph.D. candidate at the Institute of Political Science at the University of Tübingen, Germany, and part of the "PACT: Populism and Conspiracy Theory" research project.

Introduction Part I: Case Studies 1. Makers versus Getters: Productivism in Henry Ford's The International Jew 2. Anticommunism and Conspiracy Myths in Brazil: From the 1937 "Cohen Plan" to the Bolsonarist "Red Menace" 3. The Weaponization of Conspiracy Theories 4. Populism and Conspiracism in Croatia and Their Articulations among Citizens from Left to Right 5. "We are the Olive Trees"-Conspiracism and Environmentalism in Southern Italy: The Case of Xylella Fastidiosa 6. Populism and Conspiracy Thinking in the Aufstehen-Movement 7. "The Invention of a Pandemic"-Conspiracist Argumentation in the German Alternative Newspaper Demokratischer Widerstand 8. Left-Wing Populist-Conspiracism: The Case of Tunisia 9. Conspiracy Theory and the Muslim Brotherhood in Post-Revolutionary Egypt: A Left-Right Convergence? 10. Conspiratorial Tropes in Rodrigo Duterte's Populistic Rhetoric Part II: Theoretical Perspectives 11. Marxismo Cultural/Cultural Marxism: Transnational Conspiracy Theories and the Brazilian New Right 12. On the Elective Affinity between Post-Marxism, Left-Wing Populism, and Conspiracist World Views 13. A New Poetic of Conspiracism? Conspiracy Theory in a Time of Post-Narrative Politics 14. New Media's Conspiratorial Affordances: An Ecology of Mind Approach 15. Haute Baroque Bling: Style, Taste, and Distinction in the Study of Conspiracist Populism 16. Studying Conspiracy Theory after the (Current) Rise of Right-Wing Populism