In Chapter 8 of Animal Farm, the pigs' betrayal of the principles of Animalism becomes increasingly apparent as they manipulate the farm's commandments and history to maintain control over the other animals. This chapter illustrates the deepening corruption among the pigs, particularly Napoleon, who consolidates power through deceit and intimidation.

The chapter opens with the animals reflecting on their hard work during the harvest, yet they face severe food shortages. Despite their efforts, the pigs continue to enjoy privileges that the other animals do not, such as rations that are disproportionately higher. The animals are reminded of the original commandment, 'All animals are equal,' but they begin to feel the weight of their suffering as the pigs become more indistinguishable from the humans they overthrew.

Napoleon, in an effort to ensure the animals remain loyal and unaware of their plight, employs Squealer to disseminate propaganda. Squealer twists the truth, touting that their lives are better than they were under Mr. Jones, even though the animals suffer from hunger and hardship. Fear tactics are also introduced, as Napoleon spreads rumors about Mr. Jones returning to reclaim the farm, which is designed to unify the animals under his leadership and discourage dissent.

As the chapter progresses, the pigs alter the commandments to justify their actions. One of the most notable changes occurs when the commandment 'No animal shall kill any other animal' is modified to read, 'No animal shall kill any other animal without cause.' This shift allows the pigs to rationalize their violent actions against dissenters and those who question their authority.

The theme of revisionist history emerges strongly in this chapter. The pigs begin to rewrite the past, claiming that certain events happened differently than they did to create a narrative that supports their current actions. This manipulation serves to solidify their power and control over the other animals, who are left confused and disillusioned.

The chapter culminates in a harrowing scene where the pigs hold a ceremony to commemorate the supposed victory of Animal Farm. During this event, the animals witness a group of hens being executed for protesting against Napoleon's policies regarding egg production. This brutal demonstration is a clear warning against any form of rebellion and further illustrates the pigs' descent into tyranny.

Ultimately, Chapter 8 highlights the complete erosion of the original ideals of Animalism. The pigs have not only betrayed the principles of equality and justice but have also instilled a sense of hopelessness among the animals. The stark contrast between the pigs' lavish lifestyle and the other animals' suffering underscores the theme of power corruption, leaving the animals in a state of despair as they realize their dreams of a better life have been obliterated by their new leaders.