It depends on why you’re wanting to know. For instance, in some languages, knowing pronouns is important because their language gives gender to inanimate objects. In English, people will feel uncomfortable if a person assumes their gender, or get it wrong. This does not include the usage in situations where using a pronoun is a difference between pointing out one person and pointing out someone completely difference.
The best way according to him is to make a good fence. The poem's final lines says that good fences make good neighbors. That can mean that if you stick your nose in your yard you will have good neighbors. Of course, this is all figuratively and refers to much greater things in life.
By explaining the great results of his proposal, he is preparing the reader to agree with him.
By writing that his proposal will end hunger and poverty, the reader is eager to hear his plan and is predisposed to agree with him. When the reader learns of his actual plan, however, the reader is moved to shock.
The overall effect is that other plans to end poverty and hunger -- which Swift dismisses as ineffective -- now appear more reasonable.
