The Brookings Institution says that ‘with each passing day, Iraq sinks deeper into the abyss of civil war.’ It considers how the United States could stop the slide into all-out war, and what actions the US should take if it becomes clear that Iraq cannot be saved from such a conflict. The report considers the history of civil wars in the recent past, and draws a set of lessons regarding how civil wars can affect the interests of other countries, even distant ones like the United States, and then used those lessons to fashion a set of recommendations for how Washington might begin to develop a new strategy for an Iraq caught up in all-out civil war.