Ken Burns made his mark in 1990's Civil War documentary on PBS. It won universal acclaim at the time, and rightfully so. It was an incredibly in depth study of the Civil War, the horrific tragedy of it, and the heroic figures emerging from it. Led by Lincoln, of course. But also speaking reverentially of Confederate generals like Stonewall Jackson and Robert E. Lee.
If Ken Burns had released the Civil War documentary today, I imagine the reaction to it would have been much more critical, especially regarding its reverence to some of the Confederate leaders. It's interesting to see how much society, or at least the media, has shifted the last 27 years. If you are old enough to remember the Civil War documentary and the acclaim it received at the time, you will appreciate my point.
Looking forward to watch the Vietnam War Documentary.