America is the only country on Earth to sacrifice hundreds of thousands of its own citizens in a war to end slavery.
We can assume that this writer would have been a Connecticut Yankee, a strong opponent of the South and slavery.
The year 1859, when Darwin changed the course of science and when John Brown rebelled and died, was a profound historical turning point.
Darwin was unquestionably a racist, arguing that civilization would advance even at the cost of inevitable racial extermination.
Alexander H. Stephens was Vice President of the Confederacy. In 1861 he delivered an oration justifying slavery and rebellion on scientific grounds.