One topic that might be worth exploring in 1984 is the demonization of the enemy. The Party, through repetition and association, inextricably links Goldstein to feelings of generalized hatred:
The sight or even the thought of Goldstein produced fear and anger automatically. He was an object of hatred more constant than either Eurasia or Eastasia. ... But what was strange was that although Goldstein was hated and despised by everybody, ... his influence never seemed to grow less.
When the people hear his name, hate rises to a "frenzy," and their bodies seem to almost involuntarily react to an innate, seething hatred toward Goldstein. By necessity, they need someone to protect them from this being whom they are conditioned to hate, and this fuels feelings of loyalty toward Big Brother:
Big Brother seemed to tower up, an invincible, fearless protector, standing like a rock against the hordes of Asia, and Goldstein.
Does Goldstein really exist? Does that even matter? In effect, he solidifies the populace in support of Big Brother, and the passionate hatred they all share is seemingly not questioned. The people believe what their government teaches them, seeing themselves as uniting against a common threat. You could examine the way governments have presented an altered version of reality to instigate and support wars throughout history.
You might also consider examining the ability of language to be used as a means of psychological manipulation. The government of Oceania systemically recreates and limits language to influence the thoughts and behaviors of its populace. Language thus becomes so hampered that people are unable to disentangle themselves from the doublespeak which is used to justify their government's actions:
Doublethink lies at the very heart of Ingsoc, since the essential act of the party is to use conscious deception while retaining the firmness of purpose that goes with complete honesty. To tell deliberate lies while genuinely believing in them, to forget any fact that has become inconvenient, and then, when it becomes necessary again, to draw it back from oblivion for just so long as it is needed, to deny the existence of objective reality and all the while to take fake account of the reality which one denies—all this is indispensably necessary.
Since language is an integral part of social connections, social roles, personal identity, and personal beliefs, altering the way language is used forever alters the way people think about themselves, their fellow man, and their government. Impeding language allows the government of Oceania to more easily control its populace because it limits their ability to reason, evaluate, and connect.