Evolution of indirect reciprocity

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Recordkeeping and Human Evolution (2006, unknown): “Thus, culturally evolved strong reciprocity norms favor biological selection for more intelligent brains ( Nowak and Sigmund 2005 ).”
Playing repeated games with large language models (2023, unknown): “Further experiments on GPT-4’s final round behaviour have shown that it did not adjust its behavior in the last round of games or when faced with varying probabilities of continuation, unlike human players who often increase cooperation when future interactions are likely 42,43 .”
Monetary sacrifice among strangers is mediated by endogenous oxytocin release after physical contact (2008, background): “Keywords: Cooperation; Altruism; Sacrifice; Trust; Touch”
Patterns of participation and free riding in territorial conflicts among ringtailed lemurs (Lemur catta) (2004, background): “For example, com puter simulations and analytical models have shown that individual recognition increases cooperation (Crowley et al. 1996; Nowak and Sigmund 1998; Nowak et al. 2000), and a strategy of "raise-the-stakes," in which individuals”
Reputation management: Why and how gossip enhances generosity (2016, background): “One solution to this challenge is that human social networks contain systems of indirect reciprocity, where cooperators gain a good reputation and receive future indirect benefits from third parties (Nowak & Sigmund, 2005).”