F. De Waal and S. Macedo, Primates and Philosophers: How Morality Evolved (Princeton, NJ: Princeton Science Library, 2009).
789
B. Thomas et al., “Harming Kin to Save Strangers: Further Evidence for Abnormally Utilitarian Moral Judgments After Ventromedial Prefrontal Damage,” J Cog Nsci 23 (2011): 2186.
