Many Americans, argues Michael C. C. Adams, tend to think of the Civil War as more glorious, less awful, than the reality. In Living Hell, Adams tries a different tack, clustering the voices of myriad actual participants on the firing line or in the hospital ward to create a virtual historical reenactment. Neither film nor reenactment can fully capture the hard truth of the four-year conflict. Living Hell presents a stark portrait of the human costs...