A conflict is a literary element that is present in all stories. This refers to a struggle between two opposing forces. These two forces are the antagonist and the protagonist. Moreover, the conflict can be internal (within the protagonist) or external (between two people or between a person and an external force). The conflict is what drives a story and adds tension to it.
In Gulliver's Travels, we have several examples of conflict. The main one, however, is the struggle that Gulliver experiences between him and his positive idea of England. As Gulliver travels more and more, he begins to realize that England is not as wonderful as he thought it was, and that there are things they could learn about other cultures.