“The Day The Earth Stood Still” was a milestone in the history of the cinema. It was perhaps the first truly serious science fiction movie, and certainly the first such film to achieve mainstream success. Before it, and for the most part, after it, science fiction films were b-movies. “The Day The Earth Stood Still” changed that.
Its combination of serious social critique with the tropes of science fiction cinema was a shocking break from the previously accepted notions of filmic science fiction cinema. It remains one of the most influential films ever made, and not merely within its own genre or medium – when Ronald Reagan was President, he made references to the warring nations of Earth uniting against an extra-terrestrial threat, apparently inspired by his viewings of “The Day The Earth Stood Still“. More recently, 2009’s “District 9” has shown that the science fiction film as social commentary is alive and well.