All self-respecting legal history is supposed to end by the twentieth century. As we approach our own lives, experience and training—and those events that we have actually witnessed—we allegedly lose that "objectivity" which makes the "science" of history itself possible. Certainly, there is no point in burdening the reader with the "original" materials, including cases and statutes, that make up the bulk of any legal education. But there are good reasons to reflect on our own legal century from an "historical perspective."
Daniel R. Coquillette. "The Twentieth Century." International Journal of Legal Information 31, no.2 (2004): 211-237.