The brain is too complex to have evolved

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Claim

The brain is too complex to have evolved.

Source

Responses

  1. The nervous systems of insects and flatworms do not contain brains, but contain clusters of neurons called ganglia that control their movements and behavior. While it is true that ganglia are very different from simple nervous systems, it does not take a complex set of neurons to produce a beneficial behavior. Ganglia could be the result of many such additions of reflexes. It is a fine line to cross between clusters of ganglia and primitive brains such as those found in reptiles, which could later have evolved into the complex brains we see today. Brains could be complex precisely because they have evolved over a long period of time.
  2. Nearly all parts of the brain are widely known to perform functions on their own as well as cooperating with other parts, such as the production of regulatory hormones, or the stimulation of heart beats, breathing, or peristalsis. Even if a part is not obviously beneficial but still beneficial, it could still have evolved.
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Fallacies contained in this claim

External Links

  • Comparative Mammalian Brain Collections ([2]) has a section on Brain Evolution [3].

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