Answer:
Orwell uses the manipulation of pigs to satirize humans' ability to overthrow an oppressive system, creating another system as oppressive as the previous one.
Step-by-step explanation:
I believe you are referring to "Animal Farm", the fable written by George Orwell, where we learn about a farm where animals decide to rebel, expel humans and control their own activities. Animals believe that humans are oppressive and harmful to them and for that reason, they rebel. When humans are expelled, it is decided that the pigs will be the leaders of the animals because they are very intelligent, however, the pigs start to be as oppressive as humans, which is ironic, because the animals exchanged one oppressive system for another they are oppressive.
Orwell uses this to lampoon the human capacity to be highly rational and intelligent, but not to be able to not exploit and oppress other human beings, especially in political decisions, where an oppressive government is overthrown so that another oppressive government can be established.