The Gadaffi angle is also interesting:
characterising the Darfur war as 'Arabs' versus 'Africans' obscures the reality. Darfur's Arabs are black, indigenous, African and Muslim - just like Darfur's non-Arabs, who hail from the Fur, Masalit, Zaghawa and a dozen smaller tribes.
Until recently, Darfurians used the term 'Arab' in its ancient sense of 'bedouin'. These Arabic-speaking nomads are distinct from the inheritors of the Arab culture of the Nile and the Fertile Crescent.
'Arabism' in Darfur is a political ideology, recently imported, after Colonel Gadaffi nurtured dreams of an 'Arab belt' across Africa, and recruited Chadian Arabs, Darfurians and west African Tuaregs to spearhead his invasion of Chad in the 1980s. He failed, but the legacy of arms, militia organisation and Arab supremacist ideology lives on.