It's best to think of these as two things - they're related, but there's different dynamics going on with each of them. A key difference is Abyei is contested territory. We still do not know whether Abyei is going to belong to the new country of South Sudan or effectively the new country of Sudan, the northern part. That was supposed to be decided by a referendum in January; that referendum never happened, so it was being dealt with through political negotiations.

What's really interesting, though, is that some people in the Messirya are starting to see Darfuri rebels - so non-Arab, [from the] Justice and Equality Movement - have moved over into Southern Kordofan, which is supposed to be a Messirya stronghold, and started recruiting Messirya to go and fight against the Khartoum government in Darfur. Just another example of how everything in Sudan is interlinked.

When you are dealing with a mass movement, as opposed to a quote-unquote "elite," you are talking to people who don't have time to read long research papers. You have to communicate with them in sound bites, around every other thing they are doing. So it takes a long time to shift people from one message to the next, especially if your foundational narrative was, "The only one thing in the entire world you should be paying attention to is Darfur."

Strikingly consistent across all of the battles in Sudan's history has been a fundamental conflict over what are and what are not seen as legitimate aspects of Sudanese identity.

Southern Kordofan is not a disputed territory. It is, and will remain, in the north, where the Nuba Mountains are. People believe there was a genocide there in 1990s. The Nuba, who are northerners, fought with the south in the north-south war. But they have their own individual interests, and they will remain in the north after the south splits.

There's a huge misconception that it's all about the oil, and the truth is there's actually not much oil left in Abyei. The misperception arose because when the peace agreement was signed in 2005, Abyei accounted for a quarter of Sudan's oil production. Since then, the Permanent Court of Arbitration in The Hague defined major oil fields to lie outside Abyei. They're in the north now, not even up for grabs, and they account for one percent of the oil in Sudan. The idea that it's "oil-rich Abyei" is out of date.

It's best to think of these as two things - they're related, but there's different dynamics going on with each of them. A key difference is Abyei is contested territory. We still do not know whether Abyei is going to belong to the new country of South Sudan or effectively the new country of Sudan, the northern part. That was supposed to be decided by a referendum in January; that referendum never happened, so it was being dealt with through political negotiations.