1. The City of God Against the Pagans;Augustine of Hippo,1998
2. Economic and Social History of Ancient Greece: An Introduction;Austin,1977
3. How I came to write looking backward;Bellamy;The Nationalist (Boston),1889
4. The Idea of Progress: An Inquiry into its Origin and Growth;Bury,1920
5. Socialism: utopian and scientific;Engels,1880