Clifford Ando, Imperial Ideology and Provincial Loyalty in the Roman Empire
(Berkeley: University of California Press, 2000), pp. 40-41 (footnote omitted):
Starting in particular with the reign of Hadrian, the imperial
administration also explicitly advertised an ideology of unification. This
ideology constructed the empire as an all-embracing collective by minimizing differences in culture and class and emphasizing the similarity of each
individual's relationship to the emperor and especially the all-inclusive benefits of Roman rule.