Chapter Seven, "Tit for Tat", proposes that ethical behavior is in fact beneficial for the individual under real-life conditions, and proposes five practical ethical rules based on a computer simulation of the Prisoner's Dilemma.
The winner was a very simple strategy submitted by Anatol Rapoport called "TIT FOR TAT" (TFT) that cooperates on the first move, and subsequently echoes (reciprocates) what the other player did on the previous move.
Evolutionary game theory, derived from the mathematical theories formalised by von Neumann and Morgenstern (1953), was first devised by Maynard Smith (1972) and explored further in bird behaviour by Robert Hinde.
Herz und Mund und Tat und Leben, BWV 147 | Tit for tat | Tawny Tit-Spinetail | P'tit quinquin | TIT FOR TAT | TAT-1 | Long-tailed Tit | great tit | Eurasian Penduline Tit | Willow Tit | Varied Tit | Tit for Tat | Tit-Bits | Tat Wood | Tat (HIV) | TAT-14 | TAT | Tat | Southern Black Tit | Père David's Tit | Parc Linéaire Le P'tit Train du Nord | Palawan Tit | Marsh Tit | I Taw a Putty Tat | Great Tit | Goh Tat Chuan |
His most notable appointment was as ambassador to Moscow from 1977 to 1980, until he was expelled as a tit-for-tat when the Soviet ambassador Vsevelod Sofinsky was expelled for passing funds to the pro-Soviet Socialist Unity Party of New Zealand.
A tit-for-tat user group is formalized as a virtual organisation (VO), allowing the mutual use of such community resources.