“It may well be true, as F. Scott Fitzgerald famously observed, ‘The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function,’ but there is also something to be said—even without reference to how raggedly Fitzgerald functioned—for single-mindedness. In warfare, particularly. Jackson, Mary Chesnut told her diary after hearing him described by another general, ‘was a one-idea man.’ Orphaned at an early age, Jackson took God as his father, heaven as his destination, and killing enemy soldiers as his duty. Once, when a colonel under him expressed regret that his men had killed three Union soldiers whose gallantry had been conspicuous, Jackson said, ‘No, Colonel. Shoot them all. I don’t want them to be brave.’”—Roy Blount, Jr., writing well about how totally insane Stonewall Jackson was.