New research from the Journal of Applied Social Psychology presents causal evidence that conspiracy beliefs can damage relationships. Using a series of experiments, the study found that when one person expresses conspiracy beliefs, relationship satisfaction decreases—unless both individuals hold similar beliefs. The study moves beyond correlation, offering proof that the endorsement of conspiracy theories can impact the quality of interpersonal connections. The motivation for the research stems from growing concerns about how conspiracy beliefs, particularly during the COVID-19 pandemic and su…