▪ Abstract The social brain (or Machiavellian Intelligence) hypothesis was proposed to
explain primates' unusually large brains: It argues that the cognitive demands of living in …

We present a detailed reanalysis of the comparative brain data for primates, and develop a
model using path analysis that seeks to present the coevolution of primate brain (neocortex) …

Cognition presents evolutionary research with one of its greatest challenges. Cognitive
evolution has been explained at the proximate level by shifts in absolute and relative brain …

Human life histories, as compared to those of other primates and mammals, have at least
four distinctive characteristics: an exceptionally long lifespan, an extended period of juvenile …

The prefrontal cortex makes up almost a quarter of the human brain, and it expanded
dramatically during primate evolution. The Neurobiology of the Prefrontal Cortex presents a …

We found that amygdala volume correlates with the size and complexity of social networks in
adult humans. An exploratory analysis of subcortical structures did not find strong evidence …

The social brain hypothesis was proposed as an explanation for the fact that primates have
unusually large brains for body size compared to all other vertebrates: Primates evolved …

The widely held hypothesis that enlarged brains have evolved as an adaptation to cope with
novel or altered environmental conditions lacks firm empirical support. Here, we test this …

Although much attention has been focused on explaining and describing the diversity of
social grouping patterns among primates,,, less effort has been devoted to understanding …

Explanations for primate brain expansion and the evolution of human cognition and culture
remain contentious despite extensive research. While multiple comparative analyses have …