Oxytocin Motivates Non-Cooperation in Intergroup Conflict to Protect Vulnerable In-Group Members De Dreu, Carsten K. W. ; Shalvi, Shaul ; Greer, Lindred L. ; Van Kleef, Gerben A. ; Handgraaf, Michel J. J. Abstract Publication: PLoS ONE Pub Date: November 2012 DOI: 10.1371/journal.pone.0046751 Bibcode: 2012PLoSO...746751D