In "Animal Farm," the years bring significant changes to the farm and the animals living there. At the beginning of the story, the animals successfully overthrow their human owner, Mr. Jones, and establish their own society based on the principles of Animalism. However, over time, the pigs who have taken on leadership roles begin to become more and more like humans and less like their fellow animals.
One of the most significant changes that occur on the farm is the rise of the pigs to power. They take control of the government, establish a new set of laws, and even adopt human-like behaviors such as walking on two legs and wearing clothing. As the novel progresses, it becomes clear that the pigs are abusing their power and using it to enrich themselves at the expense of the other animals.
Additionally, the farm becomes more prosperous under animal control, but the prosperity is short-lived. The pigs begin to manipulate the other animals and hoard resources, causing economic disparity between themselves and the rest of the animals. The pigs also gradually become more violent and oppressive, using their power to maintain control and quash dissent.
In the end, the changes brought by the years lead to the complete transformation of the farm from a symbol of hope and equality to one of oppression and inequality. As Orwell writes in the book, "The creatures outside looked from pig to man, and from man to pig, and from pig to man again; but already it was impossible to say which was which." The animals have become just like the humans they sought to overthrow, and the dream of a truly equal and just society seems further away than ever before.