This document provides an overview of the history and development of the American film industry, with a focus on Hollywood. It discusses how Hollywood became the dominant center of American film production in the early 20th century due to favorable weather and the migration of film studios to the Los Angeles area. It describes the classical Hollywood era from the 1920s-1950s, known as the Golden Age, when the major studios controlled production, distribution, and exhibition. It also outlines the decline of the studio system after World War II due to legal rulings and the rise of television, as well as the transition to the "New Hollywood" era from the 1960s onward.