The intriguing title of a recent book by Prof Ed Dutton, an entertaining philosopher who calls himself “The Jolly Heretic”.   

The relevance to Oasis-Cities is summed-up in this promotional passage..

The authors show how a resistant class of intelligent, religious conservatives will band together to preserve enclaves of civilization that may survive most of the coming apocalypse, and from its ashes rebuild a new world: A Neo-Byzantium.  

Civilisation’s Life Rafts