In Animal Farm, what does the animals’ behavior at the end of the novel tell us about “revolution”?

By the end of the novella, the pigs resemble their former human masters by walking upright on two legs, wearing clothes, and carrying whips. The other animals are oppressed and treated like second-class citizens on the farm, where they work long hours and are malnourished. The Seven Commandments have been eliminated and reduced to one remaining commandment, which reads, "ALL ANIMALS ARE EQUAL BUT SOME ANIMALS ARE MORE EQUAL THAN OTHERS" (Orwell, 37). This illogical commandment allows the pigs free rein to rule as they please and tyrannize the other animals. The depressing atmosphere and threatening environment Napoleon has cultivated on the farm is the complete opposite from what Old Major had envisioned at the beginning of the novella. After the revolution, the animals hoped to establish an egalitarian society founded on solidarity, where all animals were treated equally. Tragically, Napoleon usurped power and ruled over the farm as a ruthless tyrant. The oppressive environment and pig aristocracy that has been established on the farm indicate that the Revolution was not a success. Essentially, Napoleon has simply replaced Mr. Jones, and the animals suffer under the same oppressive rule at the end of the novella than they did at the beginning.