Dio Cassius: Roman: History

: Nearly complete; these cover the critical period of 65 BCE to 12 BCE, detailing the collapse of the Republic and the rise of Augustus.

: Surviving largely through the 11th-century epitomes of John Xiphilinus and the 12th-century works of John Zonaras. Primary Access Points Dio Cassius: Roman History

: 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. : Nearly complete; these cover the critical period

: The Internet Archive provides digitized versions of all 9 Loeb volumes for in-depth study. Cassius Dio — Epitome of Book 73 : The Internet Archive provides digitized versions of

: Essential modern analysis can be found in Fergus Millar’s A Study of Cassius Dio or via academic archives like JSTOR and Academia.edu.

For detailed research or reading, the following resources are highly recommended: