“…humans are "socially responsible" self-interested agents) (Axelrod and Hamilton, 1981;Hanaki et al, 2007;Jennings and Campos, 1997). However, increasing amounts of evidence suggests broader contexts such as social norms, risk factors and group size may be just as important as individual-scale, self-interested cognitive processes for understanding the social behaviors of groups and the individuals that comprise them Zitzler, 1999;Cacioppo and Patrick, 2008;Paluck, 2009;Pfeiffer et al, 2014;Henrich, 2015;Tomova et al, 2020;Badman et al, 2020;Szekely et al, 2021;Spektor et al, 2021;FeldmanHall and Nassar, 2021;Momennejad, 2022). Group size effects on cooperation especially remain controversial and unclear .…”