The ordo equester was much more variegated and complex than the senatorial order. The most privileged, who held imperial administrative positions, could attain a level of power equal to or higher than that of senators; however, most equestrians were only important at a local level. This complexity makes it difficult to study the ordo as a whole. The tradition of studies that refers to Hans Georg-Pflaum focused first on equestrians who held procuratorial posts, trying, after this, to extend its view to the remaining equestrians (mainly Ségolène Demougin with the equestrians of the Julio-Claudian dynasty). The congress in Bruxelles-Leuven in 1995 brought attention back to the equestrian order as a whole, but no one has attempted to reconstruct a comprehensive history after Arthur Stein. For this reason, Caillan Davenport's work, which aims at outlining the history of the equestrian order from its origins in the Roman Republic up to the late Empire, is worthy of attention.