The term "sigma male" describes a man who lives outside the traditional dominance hierarchy occupied by alpha and beta male. Sigma males are often seen as the introverted counterparts to the more dominant and extroverted alpha male. They forge their path and hold a mysterious allure due to their self-sufficiency and independence. Sigma males in movies can be loner heroes, loner villains or sometimes both with an anti-hero. See this list of Sigma Males in movies.
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