Cooperative breeding and human cognitive evolution

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On the relationship between the “default mode network” and the “social brain” (2012, unknown): “The “cooperative breeding hypothesis” proposed by Hrdy and colleagues (Burkart et al., 2009; Hrdy, 2009) suggests that it was the case, but that other apes and our common ancestor lacked the motivational preconditions that were required to developed full “human-style” mentalizing.”
The self-domestication hypothesis: evolution of bonobo psychology is due to selection against aggression (2012, background): “For example, increases in social tolerance among primates have been predicted as a result of kinship bonds or as a result of cooperative breeding (Chapais & Berman 2004; Maestripieri 2007; Burkart et al. 2009).”
Chimpanzee helping in collaborative and noncollaborative contexts (2010, background): “…jacchus, have behaved in amore altruistic manner than chimpanzees in the paradigm of Silk et al. (2005) and Jensen et al. (2006), leading Burkart et al. (2007, 2009) to suggest that the active food-sharing characteristic of cooperative breeders may lead them to more food-related…”
Natural pedagogy as evolutionary adaptation (2011, unknown): “In other words, the cognitive mechanisms of natural pedagogy, this asymmetric but cooperative social learning system might have evolved together with the technological, neurobiological, and social factors that made such an adaptation necessary and possible [70].”