Humans display a ‘cooperative phenotype’ that is domain general and temporally stable

Peysakhovich, A., Nowak, M. & Rand, D.

Nat Commun 5, 4939 (2014).
https://doi.org/10.1038/ncomms5939

Abstract

Understanding human cooperation is of major interest across the natural and social sciences. But it is unclear to what extent cooperation is actually a general concept. Most research on cooperation has implicitly assumed that a person’s behaviour in one cooperative context is related to their behaviour in other settings, and at later times. However, there is little empirical evidence in support of this assumption. Here, we provide such evidence by collecting thousands of game decisions from over 1,400 individuals. A person’s decisions in different cooperation games are correlated, as are those decisions and both self-report and real-effort measures of cooperation in non-game contexts. Equally strong correlations exist between cooperative decisions made an average of 124 days apart. Importantly, we find that cooperation is not correlated with norm-enforcing punishment or non-competitiveness. We conclude that there is a domain-general and temporally stable inclination towards paying costs to benefit others, which we dub the ‘cooperative phenotype’.

From the Discussion

Here we have presented a range of evidence in support of a ‘cooperative phenotype’: cooperation in anonymous, one-shot economic games reflects an inclination to help others that has a substantial degree of domain generality and temporal stability. The desire to pay costs to benefit others, so central to theories of the evolution and maintenance of cooperation, is psychologically relevant and can be studied using economic games. Furthermore, our data suggest that norm-enforcing punishment and competition may not be part of this behavioral profile: the cooperative phenotype appears to be particular to cooperation.

Phenotypes are displayed characteristics, produced by the interaction of genes and environment. Though we have shown evidence of the existence (and boundaries) of the cooperative phenotype, our experiments do not illuminate whether cooperators are born or made (or something in between). Previous work has shown that cooperation varies substantially across cultures, and is influenced by previous experience, indicating an environmental contribution. On the other hand, a substantial heritable component of cooperative preferences has also been demonstrated, as well as substantial prosocial behaviour and preferences among babies and young children. The ‘phenotypic assay’ for cooperation offered by economic games provides a powerful tool for future researchers to illuminate this issue, teasing apart the building blocks of the cooperative phenotype.

The research is here.

Cooperative phenotype predicts economic conservatism, policy views, and political party support

Claessens, S., and others.

(2020, July 29).
https://doi.org/10.31234/osf.io/t7rqb

Abstract

Decades of research suggest that our political differences are best captured by two dimensions of political ideology: economic and social conservatism. The dual evolutionary framework of political ideology predicts that these dimensions should be related to variation in general preferences for cooperation and group conformity. Here, we show that, controlling for a host of demographic covariates, a general cooperative preference captured by a suite of incentivised economic games (the "cooperative phenotype") is indeed negatively correlated with two widely-used measures of economic conservatism - Social Dominance Orientation and Schwartz's altruistic vs. self-enhancement values. The cooperative phenotype also predicts political party support and economically progressive views on political issues like income redistribution, welfare, taxation, and environmentalism. By contrast, a second "norm-enforcing punishment" dimension of economic game behaviour, expected to be a proxy for social conservatism and group conformity, showed no reliable relationship with political ideology. These findings reveal how general social preferences that evolved to help us navigate the challenges of group living continue to shape our political differences even today.

From the Discussion

As predicted by the dual evolutionary framework of political ideology we found that the cooperative phenotype captured by our economic games negatively covaried with two widely-used measures of economic conservatism: Social Dominance Orientation and Schwartz’s altruistic vs. self-enhancement values. This builds upon previous studies identifying negative correlations between SDO and cooperative behaviour and between altruistic values and cooperative behaviour. The small-to-medium effect size for the relationship between SDO and the general cooperative preference (semi-partial r = 0.24) is comparable to the effect size found in a recent meta-analysis of personality traits and economic game behaviour. Our results suggest that previous correlations between measures of economic conservatism and gameplay have emerged because of an underlying relationship between economic conservatism and a general cooperative preference, rather than because of idiosyncratic features of particular conservatism measures or particular games.