The source provides excerpts from an article titled "Ten Game-Changing Western Films," which catalogs and analyzes ten pivotal movies that shaped the Western genre from 1939 to 2015. Each entry explains why the film is considered innovative and details its legacy and lasting impact on cinema, highlighting how the genre evolved from B-movie status to a complex art form. Key selections include John Ford’s Stagecoach for establishing the genre's visual grandeur and John Wayne's stardom, Sergio Leone's The Good, the Bad and the Ugly for introducing the stylized Spaghetti Western, and Clint Eastwood’s Unforgiven for deconstructing the heroic myth. The list demonstrates the Western's shift from romanticized heroism to darker, more psychological themes, culminating with modern interpretations like the neo-Western No Country for Old Men and the experiential survival film The Revenant.