A History of the Roman World from 30 B.C. to A.D. 138 (1968) is a comprehensive survey of that period of Roman history during which the Principate was established and the Pax Romana consolidated. It looks at the lives of the Emperors and political and military developments, and contains sections on social, economic and cultural life.

Part 1. The Founding of the Principate 1. Augustus Princeps 2. Italy 3. The Provinces 4. The Frontiers and Beyond 5. The Literature of the Augustan Age Part 2. The Julio-Claudian Emperors 6. Tiberius 7. Gaius 8. Claudius 9. Nero Part 3. The Italian Emperors 10. Anarchy 11. Vespasian 12. Titus 13. Domitian 14. Flavian Frontiers 15. The Economic Life of the Empire 16. Literature Between A.D. 50 and 100 Part 4. The Non-Italian Emperors 17. Nerva 18. Trajan 19. Hadrian 20. The Rise of Christianity 21. Literature and Art in the Early Second Century