心の理論
The social brain hypothesis, detailed by R.I.M Dunbar in the article "The Social Brain Hypothesis and Its Implications for Social Evolution", supports the fact that the brain originally evolved to process factual information. The brain allows an individual to recognize patterns, perceive speech, develop strategies to circumvent ecologically-based problems such as foraging for food, and also permits the phenomenon of color vision. Furthermore, having a large brain is a reflection of the large cognitive demands of complex social systems. It is said that in humans and primates the neocortex is responsible for reasoning and consciousness. Therefore, in social animals, the neocortex came under intense selection to increase in size to improve social cognitive abilities. Social animals, such as humans are capable of two important concepts, coalition formation, or group living, and tactical deception, which is a tactic of presenting false information to others. The fundamental importance of animal social skills lies within the ability to manage relationships and in turn, the ability to not just commit information to memory, but manipulate it as well. An adaptive response to the challenges of social interaction and living is theory of mind. Theory of mind as defined by Martin Brüne, is the ability to infer another individual's mental states or emotions. Having a strong theory of mind is tied closely with possessing advanced social intelligence. Collectively, group living requires cooperation and generates conflict. Social living puts strong evolutionary selection pressures on acquiring social intelligence due to the fact that living in groups has advantages. Advantages to group living include protection from predators and the fact that groups in general outperform the sum of an individual's performance. But, from an objective point of view, group living also has disadvantages, such as, competition from within the group for resources and mates. This sets the stage for something of an evolutionary arms race from within the species.