Final answer:
The revisionist history myth that presents a biased perspective asserting that the South did nothing wrong during the war and was honorable is known as the "Lost Cause" myth.
Step-by-step explanation:
The revisionist history myth that presents a biased perspective asserting that the South did nothing wrong during the war and was honorable is often referred to as the "Lost Cause" myth. This myth originated in the post-Civil War era and was propagated by white Southern historians and writers. It seeks to glorify the Confederacy and downplay the role of slavery as the primary cause of the Civil War.
The Lost Cause myth portrays the South as a victim of Northern aggression and portrays Confederate leaders and soldiers as noble and heroic. It ignores the fact that the South seceded to protect the institution of slavery and that the Confederacy fought to preserve a system built on the oppression and exploitation of African Americans. By promoting this myth, proponents perpetuate a distorted and biased view of history that seeks to justify the actions of the Confederacy and diminish the significance of slavery in driving the conflict.