v. 1. The enlightenments of Edward Gibbon, 1737-1764
v. 2. Narratives of civil government
v. 3. The first decline and fall
v. 4. Barbarians, savages and empires
v. 5. Religion : the first triumph.
Barbarism and religion by J. G. A Pocock. ISBN 9780521760720. Published by Cambridge University Press in 1999. Publication and catalogue information, links to buy online and reader comments.