How does Wilson use a fence to teach the reader about her characters and the society they live in?

The fence in August Wilson's play serves as a symbol of conflicting desires. In one sense, Troy and Rose seek to build a fence to keep the world out of their lives. Rose's desire for a fence symbolizes the way in which she seeks to protect her family. She knows that Troy's checkered past is always there and that he is, perhaps, only moments away from making decisions that forever affect her and her child. Rose's fence seeks to keep the family in and the dangerous world out. It is a symbol of protection.

Though Troy seeks to protect his family and his way of life, the fence also becomes a symbol of discontent in his own life. In his confrontation with Rose, Troy exclaims that he has spent his whole life providing for the family. He has been the protector and defender of a quiet, normal life. The fence, therefore, does not protect Troy but instead keeps him from achieving his ultimate desire for individuality and self actualization.