I’ve been watching this Open Yale course about the U.S. Civil War, taught by David Blight, when I have a few minutes here and there. In the first few lectures, he goes into the regional differences that surrounded slavery, as well as what was at stake, legally and politically, in the fight over its westward expansion. Some of the narrative is a review of the basics, but then Blight builds a deep context for the dual sovereignty of federalism — and how much more of a cultural controversy it really was in the 19th century. So far, the course is really good.