Nash demonstrated mathematically that the maximum level of affluence of a society is when each of the individuals who compose it acts in view of his interest without losing sight of the interests of others. Refutes ie, the pillars of current economic theory based on free competition without rules showing how, only a behavior motivated by individualism, gender in society, actions which may decrease the average level of welfare of all its components. Within the game theory Nash, develops further the findings made earlier by other scholars, theorizing the functioning of markets with multiple equilibrium levels, which vary depending on the attitude of the players, of any authority other than a game of degree of cooperativeness among the participants. In summary Nash "mathematized" a truism. If a football team all players will try to shine on his own, and to be striker in on goal, they will be rivals rather than partners. Their door is easily broken by any other team whose players cooperate with each other to defeat the opponent. Even if the first team has the best elements is likely to lose, and that members of the second training to be distinguished, even at the individual level. When you earn all cooperate, the center-to-back. There will be an advantage varies depending on the role, capacity and the level expressed by each player individually, but there will be for everyone.
That 's what Nash "discovered" also in sharp contrast to the theories of Adam Smith, who suggested that each player must act for himself.
If you want to know more about game theory, I refer you to the very interesting article by Raffaele Langone at:
http://www.facebook.com/note.php?note_id = 390843381266 & id = 101748583911
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