Here's my conversation with Gary Gallagher, a leading historian of the American Civil War. We discuss the causes of the war, the economics and politics of slavery, military strategy, Lincoln, Grant, Lee, the Lost Cause, the Confederate Flag, and the history of extreme political division in our country from before the Civil War to today. It's here on X in full and is up everywhere else (see comment). Timestamps: 0:00 - Episode highlight 1:29 - Introduction 1:52 - What caused the Civil…