The emperor Theodosius I (AD 379–395) was one of the most remarkable figures of the late antique period. In the face of religious schism, political turmoil, and barbarian threats he managed to maintain imperial power and forge a political dynasty that would dominate both east and west for over half a century. This study, the first English language biography in over twenty years, traces his rise to power and tumultuous reign, and examines his indelible impact on a rapidly changing empire.

Emperor Theodosius (379-95) was the last Roman emperor to rule a unified empire of East and West and his reign represents a turning point in the policies and fortunes of the Late Roman Empire. In this imperial biography, Stephen Williams and Gerry Friell bring together literary, archaeological and numismatic evidence concerning this Roman emperor, studying his military and political struggles, which he fought heroically but ultimately in vain. Summoned from retirement to the throne after the disastrous Roman defeat by the Goths at Adrianople, Theodosius was called on to rebuild the armies and put the shattered state back together. He instituted a new policy towards the barbarians, in which diplomacy played a larger role than military might, at a time of increasing frontier dangers and acute manpower shortage. He was also the founder of the established Apostolic Catholic Church. Unlike other Christian emperors, he suppressed both heresy and paganism and enforced orthodoxy by law. The path was a diffucult one, but Theodosius (and his successor, Stilicho) had little choice. This new study convincingly demonstrates how a series of political misfortunes led to the separation of the Eastern and Western empires which meant that the overlordship of Rome in Europe dwindled into mere ceremonial. The authors examine the emperor and his character and the state of the Roman empire, putting his reign in the context of the troubled times.

The book won the Best Book Award for 1991 from the American Military Institute.

"This masterful study will have its place on every ancient historian's bookshelf."—Claudia Rapp, author of Holy Bishops in Late Antiquity: The Nature of Christian Leadership in an Age of Transition

An unabridged and unaltered republication of the first edition.

The division of the late Roman Empire into two theoretically cooperating parts by the brothers Valentinian and Valens in 364 deeply influenced many aspects of government in each of the divisions. Although the imperial policies during this well-documented and formative period are generally understood to have been driven by the religious and ideological aims of the emperors, R. Malcolm Errington argues that the emperors were actually much more pragmatic in their decision making than has previously been assumed. The division of responsibilities between the emperors inevitably encouraged separate developments and allowed locally varying and often changing imperial attitudes toward different forms of religious belief. Errington demonstrates that the main stimulus for action in this period nearly always came from below the level of the imperial government, and not from an imperial initiative. Extending the theory of Fergus Millar into the later empire, Errington argues that the emperors were fundamentally reactive to regionally supplied information, as Millar has asserted was the case for the High Empire. Thus, despite significant structural changes, the empire remained broadly traditional in its operations.

An unabridged and unaltered republication of the first edition.