The book explores the profound moral and spiritual evolution of the Roman world from the tyranny of the Julio-Claudian dynasty to the philosophical reign of Marcus Aurelius. Samuel Dill focuses on the inner life of society rather than external political history, using inscriptions, literature, and philosophical texts to paint a detailed picture of the era.
The author begins by analyzing the aristocracy under the terror of tyrannical emperors, examining how absolute power corrupted character, bred espionage, and forced men into servility or tragic defiance. The narrative then shifts to the world of satirists like Juvenal and Martial, revealing the deep economic and moral chasms between the wealthy elite and the struggling masses in the capital.
A significant portion of the work is devoted to the rise of freedmen, who gradually seized control of trade, commerce, and even imperial administration, shifting the economic foundations of the empire. Dill contrasts the traditional Roman attitudes with the new social mobility that allowed emancipated slaves to accumulate vast fortunes and assume municipal power.
The second half of the book explores the deep religious and philosophical revival that characterized the Antonine age. As traditional paganism lost its grip on the masses, philosophy transformed into a guide for conduct, striving to supply a rule of life and a higher vision of the divine. Simultaneously, Eastern mystery religions, such as the worship of Isis and Mithra, swept through the empire, promising sacramental grace and personal immortality to souls distressed by the spiritual emptiness of the age.
Dill demonstrates how these various spiritual and intellectual movements attempted to find an anodyne for human suffering and moral decay. While philosophy remained largely an esoteric creed for the educated few, the emotional and mystical cults captured the devotion of the masses, ultimately preparing the ground for the profound religious shifts of late antiquity.