About: http://webisa.webdatacommons.org/411998053

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I have not read Quigley, but he is on my radar.As far as I am aware Glubb hadn't read Spengler - he was an Arabophile (sic?) and most of his books are about Arabian culture and history.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com