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Cited: Casabianca, Silvia. "Law of Reciprocity, Human Psychology and Our Inclination To kindness." Voxxi RSS. WordPress.com VIP, 6 Dec. 2012. Web. 05 Nov. 2013. <http://voxxi.com/2 012/12/06/law-of-reciprocity-human-psychology/>. Gruven, Michael, and Adrian Jaeggi. "UC Santa Barbara Public Affairs and Communications." "UCSB Anthropologists Study the Genesis of Reciprocity in Food Sharing" The Regents of the University of California, 19 Aug. 2013. Web. 05 Nov. 2013. <http://www.i a.ucsb.edu/pa/display.aspx?pkey=3091>. InterKnowledge Corp. "History and People of Papua New Guinea." History and People of Papua New Guinea. InterKnowledge Corp., 11 Mar. 2006. Web. 05 Nov. 2013. <http://www.geographia.com/papua-newguinea/papuahistory.htm>. Unknown. "Reciprocity (Social and Cultural Anthropology)." Academia.edu. C/o Academia.edu, 11 Apr. 2013. Web. 05 Nov. 2013. <http://www.academia.edu/Documents/in/R eciprocity_Social_and_Cultural_Anthropology_>. Wardrip, Loretta. "A." Definitions of Nthropological Terms. Oregon State, 26 Dec. 2012. Web. 05 Nov. 2013. <http://oregonstate.edu/instruct/anth370/gloss.html>.