Exploring the Extremes: The Impact of Radical Right-Wing Populism on Conspiracy Beliefs in Austria

(1) Background: Populist radical right-wing parties and politicians have used conspiracy theories to perpetuate the antagonism between an evil elite conspiring against the good and unknowing people. Yet, less is known about whether and to what extent radical right-wing populism at the individual level is associated with different conspiracy beliefs. This analysis explores how the main components of radical right-wing populism—populist, nativist, and authoritarian attitudes—relate to both a general conspiracy mentality and specific conspiracy theories prevalent in political discourse. (2) Methods: Using data from an original 2023 online survey conducted in Austria, a stronghold of the populist radical right, this study includes new questions on immigration, COVID-19, and climate change, as well as a conspiracy mentality scale. (3) Results: The analyses reveal that all the main components are positively associated with different conspiracy beliefs, albeit to varying degrees. Across models, the strongest predictor is populism, followed by nativism and authoritarianism. Nativism varies the most across different conspiracy beliefs and is particularly associated with the belief in conspiracy theories related to immigration and climate change. (4) Conclusions: The results highlight the prevalence of radical right-wing populist attitudes across various conspiracy beliefs, reflecting how populist radical right-wing actors leverage conspiracy theories in their political discourse.