Praetorian Guard

The Praetorian Guard was the elite professional force Augustus established as he reshaped the Roman military around the emperor. By reducing the political role of citizen-soldiers and concentrating power at the center, Augustus helped make the Guard an independent broker of imperial succession. Its rise illustrates how institutions built to secure authority could instead deepen political conflict and contribute to the instability of the Roman Empire.

Creation and Place in the Imperial Order

Augustus’s reforms shifted the emperor’s reliance away from an army made up of citizen-soldiers and toward the Praetorian Guard. The Guard’s creation accompanied wider changes that made political institutions more extractive: the army’s structure made secession impossible, removing an important means by which common Romans had secured political representation. The Guard thus belonged to a new imperial order in which military power was less connected to citizens’ political voice and more closely tied to the ruler at the center.

Influence over Succession

The Guard did not remain merely an instrument of the emperor. It soon became an independent broker in determining who would rule, influencing the choice of emperors through intrigue and civil conflict rather than peaceful succession. Its political weight made the imperial position more consequential and therefore more intensely contested: control of the center meant control of a powerful state, while the Guard itself had become an actor in the struggle to control it.

From Imperial Stability to Political Conflict

The Praetorian Guard’s rise formed part of a broader pattern in which concentrated power weakened the political standing of ordinary Romans while strengthening the emperor and the aristocracy. Under Tiberius, who succeeded Augustus in AD 14, the Plebeian Assembly was abolished and its powers transferred to the Senate. Citizens received public distributions of wheat, later supplemented by olive oil, wine, and pork, and entertainment through circuses and gladiatorial contests, in place of political participation. The Guard’s growing role in imperial succession exemplified the political consequences of that change: imperial authority could no longer be separated from contests among the powerful institutions and forces surrounding it.

The Guard also belongs to the book’s wider account of Rome’s decline. The argument is not that Rome fell simply because outside enemies became stronger; the Goths, Huns, and Vandals were symptoms of a crisis rooted in extractive institutions, infighting, and civil war. As authority accumulated in the emperor’s hands, property rights became less secure, state land expanded through confiscation, and struggles to seize the imperial position became more frequent. The Praetorian Guard’s role as a broker of succession makes visible one part of that institutional feedback: a force created to serve imperial rule acquired influence over who ruled, within a political system increasingly vulnerable to conflict.