What psychological factors drive the popularity of conspiracy theories, that explain significant events and circumstances as secret plots by malevolent groups? What are the psychological consequences of adopting these theories? In this talk, I will review research that attempts to answer these questions. First, I will outline research which suggests that belief in conspiracy theories is driven by psychological needs that can be characterised as epistemic (e.g., needing to reduce uncertainty), existential (e.g., needing to feel autonomous and in control) and social (e.g., needing to maintain a high level of self-esteem). I will then talk about some of the consequences of conspiracy theories for individuals' wellbeing and for society.
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