From the abstract this is a very interesting paper. I’ll spend this afternoon digging in. But I see a problem already: reality trumps academic exercise or humanity’s aggregated, self-description of its morality.
“Morality-as-cooperation draws on the theory of non-zero-sum games to identify distinct problems of cooperation and their solutions, and it predicts that specific forms of cooperative behavior—including helping kin, helping your group, reciprocating, being brave, deferring to superiors, dividing disputed resources, and respecting prior possession—will be considered morally good wherever they arise, in all cultures.”
Who is kin? Who are one’s superiors? What is prior possession? These are all questions of ideology and power. The only universal code all humanity agrees on is might makes right.
To deconstruct/interrogate your statement: What does "genetic closeness" mean? Humans are all "genetically close." So then maybe you mean "phenotypical closeness"? But then of course people who are "phenotypically close" kill and oppress each other in droves all the time. Or maybe you mean family? I live in probably the most atomized society in the world, familial bonds are extremely thin here in the U.S. -- it's 100% expected that you'll leave family forever as a coming of age as early as possible.
The number of multi-generational households has increased significantly... to 18%. In one of the most expensive housing economies in the world. There's extreme stigma against living with your family once you reach adulthood.
“Morality-as-cooperation draws on the theory of non-zero-sum games to identify distinct problems of cooperation and their solutions, and it predicts that specific forms of cooperative behavior—including helping kin, helping your group, reciprocating, being brave, deferring to superiors, dividing disputed resources, and respecting prior possession—will be considered morally good wherever they arise, in all cultures.”
Who is kin? Who are one’s superiors? What is prior possession? These are all questions of ideology and power. The only universal code all humanity agrees on is might makes right.