"Big Brother" is alleged to have been the dictator of Oceania, however wether or not he genuinely existed is a matter of contension. He is largely considered a national personification or a personification of the toatalitarian government of Oceania.
It has also been suggested that the character of Big Brother was constructed by Oceanian propagandists around a living man who may have been involved in the reveloution that led to the foundation of the state of Oceania. In his book The Theory and Practice of Oligarchical Collectivism Emmanuel Goldstein asserts that "nobody has ever seen Big Brother. His function is to act as a focusing point for love, fear, and reverence, emotions which are more easily felt towards an individual than towards an organization."