<i>"If anything, vengeance escalates the conflict, leading to an increasingly malicious game of tit for tat"</i><p>No mention of, <i>"Tit for two tats"</i> (effective), <i></i>"co-operative behaviour "* (Dawkins, Selfish Gene) or <i>"Game Theory"</i> (Avinash Dixit). [0]<p>[0] <a href="http://www.pbs.org/wgbh/amex/nash/sfeature/sf_dixit.html" rel="nofollow">http://www.pbs.org/wgbh/amex/nash/sfeature/sf_dixit.html</a>