Recovering from the US Civil War.

 There was plenty of bad feeling to go around in 1865.  Sherman had inflicted lots of pain in Georgia.  John Wilkes Booth had assassinated Abraham Lincoln.  Plenty of white southerners who had enjoyed being superior at law to black slaves were disappointed.  The subdued southern states were occupied by the US Army. The massive casualties of the war, 600,000 men, inflicted great pain on many many American families. 

   But, the Civil War had abolished slavery.  The southern states attempt to pull out of the Union and set up their own country was defeated.  These things stuck. 

   The part that is not told by the history books I have read, and I have read quite a few, is how all the bad feelings were, if not defeated, at least reduced a lot.  By World War I times, say fifty years after the end of the Civil War,  the old south had been converted into as loyal and patriotic part of the United States as any other part, and in fact more loyal and patriotic than many other parts. 

   It is difficult to imagine the course of world history if the Confederacy had survived or reappeared and made good its departure from the Union.  Certainly all the bad feelings from 1865 would have contributed mightily to such an outcome.  The Cold War with the Soviets would be all sorts of difficult for Washington DC had it been required to deal with a not very friendly Confederacy whose territory started at the city limits of DC.