Analysis of information sources in references of the Wikipedia article "மாந்தவுருவகம்" in Tamil language version.
[Paul D. MacLean] calls the human brain a "triune" brain whose three basic parts recapitulate our evolution: a reptilian core (the seat of our basic drives), surrounded by a "paleomammalian" brain (which endowed our ancestors with, among other things, affection for offspring), surrounded in turn by a "neomammalian" brain. The voluminous neomammalian brain brought abstract reasoning, language, and perhaps, (selective) affection for people outside the family. … Like many neat models, this one may be misleadingly simple; but it nicely captures a (perhaps the) critical feature of our evolutionary trajectory: from solitary to social, with the pursuit of food and sex becoming increasingly subtle and elaborate endeavors.
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