This work investigates how the life and career of the historian Tacitus reflect the broader social and political transformations of the Roman Empire during the first and second centuries. Ronald Syme, a preeminent scholar of Roman history, utilizes a rigorous prosopographical approach to examine Tacitus not merely as a writer, but as a political actor. By tracing Tacitus's advancement through the Roman government, Syme illustrates the mechanisms that allowed individuals from the western provinces to ascend to positions of power and influence within the imperial structure.

Scholars and historians widely regard this text as a foundational study for understanding the intersection of Roman historiography and imperial politics. Readers frequently note the academic density of the prose, which demands a high level of familiarity with Roman history and political terminology.