This and other scenes of unromantic slaughter aren't likely to get much notice during the Gettysburg sesquicentennial, the high water mark of Civil War remembrance. Instead, we'll hear a lot about Joshua Chamberlain's heroism and Lincoln's hallowing of the Union dead.

It's hard to argue with the Gettysburg Address. But in recent years, historians have rubbed much of the luster from the Civil War and questioned its sanctification. Should we consecrate a war that killed and maimed over a million Americans? Or should we question, as many have in recent conflicts, whether this was really a war of necessity that justified its appalling costs?

"We've decided the Civil War is a 'good war' because it destroyed slavery," says Fitzhugh Brundage, a historian at the University of North Carolina. "I think it's an indictment of 19th century Americans that they had to slaughter each other to do that."

Similar reservations were voiced by an earlier generation of historians known as revisionists. From the 1920s to 40s, they argued that the war was not an inevitable clash over irreconcilable issues. Rather, it was a "needless" bloodbath, the fault of "blundering" statesmen and "pious cranks," mainly abolitionists. Some revisionists, haunted by World War I, cast all war as irrational, even "psychopathic."

World War II undercut this anti-war stance. Nazism was an evil that had to be fought. So, too, was slavery, which revisionists--many of them white Southerners--had cast as a relatively benign institution, and dismissed it as a genuine source of sectional conflict. Historians who came of age during the Civil Rights Movement placed slavery and emancipation at the center of the Civil War. This trend is now reflected in textbooks and popular culture. The Civil War today is generally seen as a necessary and ennobling sacrifice, redeemed by the liberation of four million slaves.

But cracks in this consensus are appearing with growing frequency, for example in studies like America Aflame, by historian David Goldfield. Goldfield states on the first page that the war was "America's greatest failure." He goes on to impeach politicians, extremists, and the influence of evangelical Christianity for polarizing the nation to the point where compromise or reasoned debate became impossible.

Unlike the revisionists of old, Goldfield sees slavery as the bedrock of the Southern cause and abolition as the war's great achievement. But he argues that white supremacy was so entrenched, North and South, that war and Reconstruction could never deliver true racial justice to freed slaves, who soon became subject to economic peonage, Black Codes, Jim Crow, and rampant lynching.

Nor did the war knit the nation back together. Instead, the South became a stagnant backwater, a resentful region that lagged and resisted the nation's progress. It would take a century and the Civil Rights struggle for blacks to achieve legal equality, and for the South to emerge from poverty and isolation. "Emancipation and reunion, the two great results of this war, were badly compromised," Goldfield says. Given these equivocal gains, and the immense toll in blood and treasure, he asks: "Was the war worth it? No."