PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In my reading of the history of empires, I have come up with four reasons that almost always explain their collapse. (Jared Diamond's new book Collapse also has a list of reasons for societal collapse, slightly overlapping, but he is talking about systems other than empires.) Let me set them out, largely in reference to the present American empire.
http://www.w3.org/ns/prov#wasQuotedFrom
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