Comparative historical research is a type of research that looks at different events, people or places over time to see how they compare to each other. It's like comparing apples with oranges. For example, you might compare what people did in the 1950s to what they are doing now to see how things have changed. To do this, you need to find historical records and documents that tell you what life was like in the 1950s, and then compare that to records and documents about life today. By doing this, you can compare how things were then and how they are now and make conclusions about how the world has changed.