One of the major points of contention leading to Snowball's ouster was his plan to build a windmill. The windmill would allow for mechanization of the farm and give more time for relaxation and intellectual pursuits. Napoleon, another pig and Snowball's rival, was against building the windmill. He encouraged the other animals to agree that they should not build it. After Snowball's exile, Napoleon claimed that the windmill was originally his idea, and the animals began construction.
One of the founding tenets of the new Animal Farm was that the animals would not engage in trade with other farms. They would instead produce all necessary goods themselves and do without what they could not produce. After Snowball's exile from the farm, the other animals hired a solicitor named Mr. Whymper and began to trade for manufactured goods. Napoleon tells the other animals that the rule against this practice was fabricated by Snowball.
One of Snowball's first actions after Mr. and Mrs. Jones' expulsion from the farm was to paint the commandments of animalism, as outlined by the pig Major, on the wall of the barn. After Snowball's exile, the remaining pigs begin to add qualifiers to the original commandments to justify their increasingly human behavior. Thus, "all animals are equal" becomes "all animals are equal, but some are more equal than others."
By the end of the book, the remaining animals no longer remember Snowball, Major and the original goals of animalism. The farm is prosperous, but the standard of living for the animals is no better. As a final affront to Snowball's plan to distinguish between a world run by humans and one run by animals, the pigs begin to walk on two legs.