About: http://webisa.webdatacommons.org/203763426

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	Their theory is a version of the ???hydraulic hypothesis??? proposed by the German American historian Karl Wittfogel in his 1957 book Oriental Despotism.
http://www.w3.org/ns/prov#wasQuotedFrom	discovermagazine.com