The Civil War briefly discussed

David's Bookclub: Battle Cry of Freedom - The Daily Beast

In this brief look back at a Civil War history book, David Frum notes as follows:

From time to time, we hear denials of the centrality of slavery to the Civil War. That's apologetics, not history. Slavery was always, always there: the war's fundamental cause, the war's shaping reality.

James McPherson's Battle Cry of Freedom is now, incredibly, 25 years old. The anniversary moved me to download the book in audio format and re-ingest it after the long lapse of time. What struck me most, on this rediscovery, is how brilliantly apt is McPherson's title. Both sides of the terrible conflict insisted that the war was a war for freedom. But what did "freedom" mean?

Jefferson Davis' message to [the Confederate] Congress on January 12, 1863, proclaimed the Emancipation Proclamation 'the most execrable measure in the history of guilty man.' Davis promised to turn over captured Union officers to state governments for punishment as 'criminals engaged in inciting servile insurrection.' The punishment for this crime, of course, was death.

(p. 566.)
Davis never carried out this threat. But captured black Union troops were often massacred - and sometimes sold as property. Confederates regarded the placing of weapons in black hands as itself a war crime, and a terrible one, justifying the most terrible retribution.

It's a wonder that it isn't repeated every 5 years or so, but I don't recall ever seeing Ken Burn's masterful Civil War series since it was first shown in - good grief - 1990.  I can't quite recall now what the historians on that show had to say about the centrality or otherwise of slavery to the war.