This is a vague question, so I hope it's appropriate to response with a vague answer: regardless of the topic, I think it's important to structure introductory classes around helping students understand what history is and how it's done. For whatever reason, the idea that historians are drones who memorize dates and solidify consensus seems to have taken a real hold -- at least in the United States. Of course, that's not what historians do at all. We read sources, weigh interpretations, consider narrative frames, engage communities, and argue with one another. History is something that's done, not something that is. If I can help students engage in the process of making history (or at least help them understand the ways in which history is made) hopefully that can give them a critical eye to other kinds of history-making they'll encounter in the future.