Control of Information and History
The Party controls every source of information, managing and rewriting the content of all newspapers and histories for its own ends. The Party does not allow individuals to keep records of their past, such as photographs or documents, resulting in fuzzy and unreliable memories and gullible citizens, willing to believe what the Party feeds them.
By controlling the present, the Party is able to manipulate the past. And in controlling the past, the Party can justify all of its actions in the present.