John Brown is a man of many legacies, from hero, freedom fighter, and martyr, to liar, fanatic, and the father of American terrorism. Some have said that it was his seizure of the arsenal at Harper's Ferry that rendered the Civil War inevitable. Deeply religious, Brown believed that God had chosen him to right the wrong of slavery. He was willing to kill and die for something modern Americans unanimously agree was a just cause. And yet he was...