Although we have long considered Alwa to be the more interesting of post-Meroe states in Nubia, the limited archaeological excavations and fewer references in the external Arabic primary sources makes it more of an elusive entity. Mohi el-Din Abdalla Zarroug attempts to redress this with an admittedly speculative but provocative analysis of the kingdom of Alwa. Based on the ethnographic present (after assuming probable cultural continuity in the Nubian heartland for the last several centuries), archaeological surveys, and textual sources from Antiquity, Islamic lands, and later reports or narratives, The Kingdom of Alwa proposes an interesting interpretation of Alwa as the more powerful, wealthiest state of medieval Nubia. Instead of being a peripheral Nubian state, or, as Adams wrongly assumed, a "primitive" state based on the slave trade, Alwa may have been a major state whose influence radiated far to the east and west, perhaps vying with Kanem over influence in Darfur and what later became Wadai.
Contrary to assumptions or expectations of Makuria being the dominant Nubian kingdom, often based on the far more extensive archaeological research in northern Nubia, Alwa appears to have been able to support higher population densities while benefitting from surplus crops (through riverine and rain-based agriculture), gold exports, hides, and long-distance trade. The interdependency of the pastoralist and agriculturalist populations of Alwa became the basis for a regional economy and local exchange. Gold, iron, ivory, leather, and salt also contributed to this economy, which must have connected Alwa to the Mediterranean, Red Sea, Indian Ocean, Sudanic, and trans-Saharan trade routes. The extent to which Alwa inherited aspects of Meroitic economic or administrative structures is unknown, but Zarroug sees evidence of "Meroitized" Noba in the region during the Late Meroitic Period, according to burial types and the Axumite inscription of Ezana. Geographical factors likely favored continuity, too, suggesting Alwa succeeded Meroe as the center of Nubia. This is also the impression one gains from the external Arabic sources like al-Aswani.
Zarroug speculates that Alwa relied more on east-west trade routes that linked the kingdom to trans-Saharan routes as well as to the Red Sea. Ruins of structures in Kordofan and Darfur suggest Alwa (and probably Makuria, too) had a presence in western Sudan, likely connecting it to trade routes that led to the Fezzan and North Africa. Although the evidence is still lacking or perhaps waiting on confirmation from finds in Kanem, Darfur, and Soba, Zarroug's theory is quite plausible. We have long wondered to what extent Kanem may have played an early essential role in trade and cultural contacts across the Sudanic belt of the African continent. Hints of it can be seen in the chronicles of Ahmad b. Furtu or al-Idrisi, Ibn Said and oral traditions of Darfur suggestive of Kanem's influence further east. Perhaps Kanem and Alwa (and likely Makuria) exerted influence over the Daju and what later became Wadai as peripheral territories. Over time, secure trade routes developed which could link Alwa to the Fezzan and possibly establish a firmer "Sudan Road." The presence of Muslim traders in Alwa and Makuria may have facilitated this process, so that Christian Nubia did not represent an impenetrable barrier for Muslims of the Central Sudan.