stylistic:style_transfer, structural:summarization
Lives of the Roman emperors

Plutarch's first biographical works were the Lives of the Roman Emperors from Augustus to Vitellius. Of these, only the Lives of Galba and Otho survive. The Lives of Tiberius and Nero are extant only as fragments, provided by Damascius (Life of Tiberius, cf. his Life of Isidore), as well as Plutarch himself (Life of Nero, cf. Galba 2.1), respectively. These early emperors' biographies were probably published under the Flavian dynasty or during the reign of Nerva (AD 96–98). There is reason to believe that the two Lives still extant, those of Galba and Otho, "ought to be considered as a single work." Therefore, they do not form a part of the Plutarchian canon of single biographies – as represented by the Life of Aratus of Sicyon and the Life of Artaxerxes II (the biographies of Hesiod, Pindar, Crates and Daiphantus were lost). Unlike in these biographies, in Galba-Otho the individual characters of the persons portrayed are not depicted for their own sake but instead serve as an illustration of an abstract principle; namely the adherence or non-adherence to Plutarch's morally founded ideal of governing as a Princeps (cf. Galba 1.3; Moralia 328D–E).

Arguing from the perspective of Platonic political philosophy (cf. Republic 375E, 410D-E, 411E-412A, 442B-C), in Galba-Otho Plutarch reveals the constitutional principles of the Principate in the time of the civil war after Nero's death. While morally questioning the behavior of the autocrats, he also gives an impression of their tragic destinies, ruthlessly competing for the throne and finally destroying each other. "The Caesars' house in Rome, the Palatium, received in a shorter space of time no less than four Emperors", Plutarch writes, "passing, as it were, across the stage, and one making room for another to enter" (Galba 1).

Galba-Otho was handed down through different channels. It can be found in the appendix to Plutarch's Parallel Lives as well as in various Moralia manuscripts, most prominently in Maximus Planudes ' edition where Galba and Otho appear as Opera XXV and XXVI. Thus it seems reasonable to maintain that Galba-Otho was from early on considered as an illustration of a moral-ethical approach, possibly even by Plutarch himself.