About: http://webisa.webdatacommons.org/336520759

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	As slavery can only be profitably employed on a massive scale, and since slaves do not reproduce in sufficient numbers, a constant renewal of slave labour can only be achieved through war or other violent means.
http://www.w3.org/ns/prov#wasQuotedFrom	prosebeforehos.com