“Midnight Rising: John Brown and the Raid that Sparked the Civil War,” Tony Horwitz. Picador, Henry Holt & Co. 365 pages. $18. Many Southerners have denied that the Civil War was fought over slavery, arguing that the war was really in defense of states’ rights. But the right they were defending was to continue the “peculiar institution” of […] ↓ Read the rest of this entry…