Here is an outstanding presentation on the lost cause lie by Professor Caroline Janney. The Q&A period is also great.
The video’s description reads, “How did the Confederate myth of the Lost Cause develop? Why was it important for ex-Confederates to establish their ‘history’ of the war? And why has this version of the past continued to offer such a powerful hold more than 160 years after the Civil War? This webinar will exam the origins, architects, and lasting influence of the Confederacy’s most enduring legacy.”