The purpose of an expository essay is to inform and explain. Your essay is going to help your readers understand the issue youve chosen on the same level that you do. Your job is to analyze various perspectives on the topic youve selected and to present them to readers, along with background on the topic.
Remember, you are not offering your opinion on the issue youve selected; your objective is to inform and explain that issue. You will have opportunities to express your views on your topic later in the class, but, for now, your paper should be informative, not persuasive.
This means that, as an author, you need to remain neutral on your topic at this point. Part of the goal of research is to allow ourselves to be open to discovering new points of view on a topic, even if we start the process by thinking our minds are made up. Often, students find that their original point of view on their issue does not hold up after they read expert opinions and studies. Being willing to be convinced by research and personal reflection is an important facet of being an educated and fair-minded person. Once it is time to argue your position on your topic (in the second essay), you will be much better prepared to do so because you have put the work in now to really understand the topic.