: Nearly complete; these cover the critical period of 65 BCE to 12 BCE, detailing the collapse of the Republic and the rise of Augustus.
: His political thought often leans on Stoic principles, advocating for a "republican spirit" of cooperation between the princeps and the Senate rather than a return to a pure Republic. Structure and Survival Dio Cassius: Roman History
Cassius Dio’s Roman History ( Historia Romana ) is a monumental 80-volume work covering approximately 1,000 years, from the legendary arrival of Aeneas in Italy to 229 CE. Writing in Ancient Greek, Dio spent 10 years researching and 12 years composing his history while serving as a high-ranking Roman senator and two-time consul. : Nearly complete; these cover the critical period
: Exist mostly as sparse fragments or summaries (epitomes). Writing in Ancient Greek, Dio spent 10 years
: The Internet Archive provides digitized versions of all 9 Loeb volumes for in-depth study. Cassius Dio — Epitome of Book 73
: Dio frequently critiques the shift from merit-based adoption (like Hadrian's) to hereditary succession, famously noting that the Roman Empire descended from a "kingdom of gold to one of iron and rust" following the reign of Marcus Aurelius.
: The LacusCurtius site hosts the English translation by Earnest Cary, originally published in the Loeb Classical Library .