Who is primarily responsible for spreading Napoleon’s propaganda?

Squealer is primarily responsible for spreading Napoleon’s propaganda because he acts as the main spokesperson for the regime on the farm. His character is designed to manipulate language and facts to convince the other animals that Napoleon's decisions are always in their best interest, regardless of the truth. Squealer uses rhetorical tactics and persuasive language to distort reality and rewrite history, ensuring that the animals remain loyal to Napoleon despite the harsh conditions and changes happening around them. His role is crucial in maintaining the power dynamics on the farm, as he continuously shifts the narrative to serve Napoleon's agenda, silencing opposition and promoting a false sense of security and progress. This makes him a key figure in the implementation of the propaganda that keeps Napoleon in control.