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The early 20th century saw the birth of the "Big Five"—, MGM , Warner Bros. , 20th Century Fox , and RKO . These studios achieved dominance through "vertical integration," a business model where they controlled every stage of a film’s life: production, distribution, and even the theaters where movies were shown.

The following essay explores the historical dominance of the major Hollywood studios and how their "dream factory" model has been reshaped by the modern streaming era.