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Source Code of K. Itao and K. Kaneko "Evolution of Kinship Structures Driven by Marriage Tie and Competition" PNAS, 2020)

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Evolution of Kinship Structures

Source Codes of ・K. Itao and K. Kaneko "Evolution of Kinship Structures Driven by Marriage Tie and Competition" Proceedings of the National Academy of Sciences, 2020, https://www.pnas.org/content/pnas/117/5/2378.full.pdf ・K. Itao and K. Kaneko "Emergence of Kinship Structures and Descent Systems: Multi-level Evolutionary Simulation and Empirical Data Analyses" Proceedings of the Royal Society B, 2022, https://royalsocietypublishing.org/doi/full/10.1098/rspb.2021.2641. ・K. Itao and K. Kaneko "Emergence of Kinship Structures and Descent Systems: Multi-level Evolutionary Simulation and Empirical Data Analyses" Proceedings of the National Academy of Sciences, 2024.

One-trait model

We build a simple model of family groups, in which exchange of brides and resultant cooperation and competition are considered, by applying an agent-based model and multi-level evolution. By introducing one dimensional trait and preference, we show the emergence of the incest taboo.

Run one-trait/emergy.py to get the phase diagrams on the emergence of the incest taboo.
Run one-trait/plot.py to get the visual images on the emergence of the incest taboo.

Two-trait model

By introducing two dimensional trait and preference, we show the emergence of kinship structures.

Run two-trait/emergy.py to get the phase diagrams on the emergence of kinship structures.
Run two-trait/plot.py to get the visual images on the emergence of kinship structures.

Simple model

We simplify the one-trait model to extract the essential mechanims and conduct extensive analysis on the dependence upon population size and cultural mutation rate.

Run simple/simple.py for the simulation.

Revised model

We simplify the two-traiit model and discuss the evolution of kinship structures and descent systems.

Run revised/structure.py for the simulation.

Empirical data analyses

Data analyses using global ethnographic database, the Standard Cross-Cultural Sample are conducted. See data_analysis for details.

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MIT

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Source Code of K. Itao and K. Kaneko "Evolution of Kinship Structures Driven by Marriage Tie and Competition" PNAS, 2020)

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