Different historians have different ideas about what caused the Civil War, and the consensus among historians has shifted over the years.
Consensus amongst historians? An interesting theory, but, frankly, the idea that there are faeries at the bottom of my garden is more believable.
I meant "consensus" only in the most relative sense. A consensus among historians is not the same as a consensus among most other groups. Maybe what I should have said was that in recent years, the prevailing opinions about the Civil War have changed. But they are likely to change again, and again, in subsequent years.