Akinjogbin's Dahomey and Its Neighbors, 1708-1818 is one of the classic studies of the kingdom of Dahomey during a pivotal century in its development. Although Akinjogbin's Ebi theory of Yoruba and Aja polities appears to be untenable, or at least lacking sufficient evidence to be demonstrated fully, the rise of Dahomey as a major power in the Slave Coast region is certainly a topic worthy of analysis. Akinjogbin, who misleadingly presents early Dahomey and Agaja as opponents of the slave trade, or at least its destructive impact on Aja polities like Allada and Whydah in the 17th century, posits that Dahomey achieved an administrative revolution by replacing the Ebi theory for a more centralized, absolute monarchy in which the monarchy endeavored to control the slave trade. Indeed, Dahomey no longer resembled the Yoruba and Aja states of old and was better able to survive the 19th century than Oyo because of it.
However, in terms of economics, Dahomey became wedded to the slave trade and compromised the state's health. Factors in Europe, for instance, or the shifting interests of Oyo in terms of providing the supply of captives for export at Whydah, posed a number of problems for 18th century Dahomey kings. Oyo, under Abiodun, emphasizing Porto Novo as its primary port on the Atlantic, for example, contributed to the economic woes and depression of Dahomey. Dahomey was also not always effective at promoting Whydah as the major port on the Slave Coast. Competition from Badagry, Porto Novo and other ports, combined with the inability of Dahomey to defend Whydah from the old Whydah forces threatened the security of the port and its ability to attract Europeans. Dahomey was also, at least during the reign of Agaja's son, not effective at slave raiding. In short, Dahomey had to rely on Oyo to supply captives for export through Whydah and it had to rely on the vicissitudes of European and Atlantic World commerce and slaving. Some rulers, however, were progressive and thought of other ideas and practices, or even reviving agriculture to promote Dahomey's economy and end the long-lasting depression that began in the 1760s. By then, it was too late as the dependence on the slave trade remained the only option for Dahomey to retain access to Europe.
Despite the economic failings of 18th century Dahomey, Akinjogbin presents Aganja, Tegbesu, Kpengla, and Agonglo as visionary, progressive, rational and skilled leaders and administrators. Indeed, the survival of the Dahomey state during this century is impressive when one considers the weakness of the state militarily or its internal conflicts. In that sense, Oyo's overlordship may have paradoxically created the conditions for Dahomey to consolidate its administrative and economic basis after Agaja's rapid conquests of Allada and Whydah. Oyo and the Europeans on the coast could cause problems, but having Oyo provide some degree of security for its vassals and supplying slaves for export at Whydah, Dahomey's port, created favorable conditions for Dahomey to reestablish itself on a firm footing after 1740. To what extent Dahomey truly achieved a "revolution" can only be answered with deeper knowedge of Allada, Whydah, and Oyo as states.