Here is an excerpt from her introduction to her book, This Republic of Suffering:
The Civil War confronted Americans with an enormous task, one quite different from saving or dividing the nation, ending or maintaining slavery, or winning the military conflict—the demands we customarily understand to have been made of the Civil War generation. Americans North and South would be compelled to confront— and resist—the war's assault on their conceptions of how life should end, an assault that challenged their most fundamental assumptions about life's value and meaning. As they faced horrors that forced them to question their ability to cope, their commitment to the war, even their faith in a righteous God, soldiers and civilians alike struggled to retain their most cherished beliefs, to make them work in the dramatically altered world that war had introduced. Americans had to identify—find, invent, create—the means and mechanisms to manage more than half a million dead: their deaths, their bodies, their loss. How they accomplished this task reshaped their individual lives—and deaths—at the same time that it redefined their nation and their culture. The work of death was Civil War America's most fundamental and most demanding undertaking.