My paper with Wes Maciejewski on the Evolution of Extraordinary Self-Sacrifice is now featured in a special collection of articles on moral judgment and decision-making, so I thought it was a good time to share it here.
https://www.nature.com/articles/s41598-021-04192-w
#SocialEvolution #cooperation #altruism #spite #KinSelection #InclusiveFitness #AnimalBehavior
From a theoretical perspective, individuals are expected to sacrifice their welfare only when the benefits outweigh the costs. In nature, however, the costs of altruism and spite can be extreme, as in cases of irreversible sterility and self-destructive weaponry. Here we show that “extraordinary” self-sacrifice—in which actors pay costs that exceed the benefits they give or the costs they impose on recipients—can evolve in structured populations, where social actions bring secondary benefits to neighboring kin. When given information about dispersal, sedentary actors evolve extraordinary altruism towards dispersing kin. Likewise, when given information about dispersal and kinship, sedentary actors evolve extraordinary spite towards sedentary nonkin. Our results can thus be summed up by a simple rule: extraordinary self-sacrifice evolves when the actor’s neighbors are close kin and the recipient’s neighbors are not.
Parochialism in a bird species: playbacks of distress calls induce hierarchical patterns of helping, the bird being more prone to cooperate with close members of their group. Remarkably, this pattern is independent of kinship.
#Science #Biology #AnimalBehaviour #Bird #Wren #AlarmCall #communication #cooperation #KinSelection
📄 Camerlenghi et al (2023) Multilevel social structure predicts individual helping responses in a songbird. Current Biology http://dx.doi.org/10.1016/j.cub.2023.02.050
A preview of my very first evolutionary game theory paper is now posted as preprint 🎉
https://www.researchsquare.com/article/rs-1868476/latest
tags: #GameTheory #evolution #cooperation #KinSelection #PublicGoodsGame
Human cooperation (paying a cost to benefit others) is puzzling from a Darwinian perspective, particularly in groups with strangers who cannot repay nor are family members. The beneficial effects of cooperation typically increase nonlinearly with the number of cooperators, e.g., increasing return...
I read a really interesting #anthropology paper Jones (2000) and worked through a group #nepotism #model it describes,
which combines #GameTheory and #KinSelection, to explain key features of #cooperation within culturally-defined #kin groups.
Amy Serrat
Journal of Plant Ecology
Marc Robinson-Rechavi
Matt Willemsen
DB Krupp
fx dechaume-moncharmont
Nadiah Kristensen
anubis2814