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15 March 2012

Iterative game of life

Came across an article on Psychology Today called Do Married Women Want Their Husbands to Cheat?.

Further to what the author says about women's choices in men, I would add that women have to choose a balance between these two extremes:

  1. choose men who are not promiscuous because if he cheats on her, it will potentially divert his resources to other women's children
  2. choose men who are promiscuous because it will benefit:
    1. her sons because promiscuity will give her sons a reproductive advantage
    2. her daughters because they will inherit his mother's "attraction to promiscuous men" genes and thus confer a reproductive advantage on her daughters
I chose to call this post "the iterative game of life" because it is reminiscent of the "prisoner's dilemma problem". The prisoners behave differently depending on whether every game is discrete and doesn't affect following games or whether the game is iterative. While the prisoners will act purely selfishly in the former case, they may tend to cooperate in the latter to avoid each punishing the other in successive games.

Similarly, evolution does not operate within a generation insulated from succeeding generations. If it did, then women would only choose non-promiscuous men. We all know that this is false in reality. A superior evolutionary strategy is to consider the effects in succeeding generations.

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