# A complex adaptation: the eye

**URL:** <https://discourse.peacefulscience.org/t/a-complex-adaptation-the-eye/2454>\
**Category:** Side Conversation\
**Tags:** Science\
**Created:** [October 27, 2018, 2:34am UTC](https://discourse.peacefulscience.org/t/a-complex-adaptation-the-eye/2454 "2018-10-27T02:34:23Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![Mung](https://avatars.discourse-cdn.com/v4/letter/m/a5b964/32.png) [@Mung](https://discourse.peacefulscience.org/u/Mung)\
**Post date:** [October 28, 2018, 3:50pm UTC](https://discourse.peacefulscience.org/t/a-complex-adaptation-the-eye/2454/10 "2018-10-28T15:50:05Z")

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> [@AlanRogers](#):
>
> There is one more piece to the argument, which didn’t make it into my book. If the vertebrate eye did evolve, then it must have evolved by natural selection, because no other evolutionary force is capable of assembling a complex adaptation.

@AlanRogers, thank you for your comment. I absolutely agree that this is the missing piece from your argument.

I agree that eyes evolved. The book makes a good case that eyes evolved. But it did not show that they evolved by natural selection. The conclusion that they evolved by natural selection does not follow from what you wrote in the book. We have a thread here now on eye evolution and perhaps you could find some time to contribute?

> [@Nathan Lents: How Did The Eye Evolve?](https://discourse.peacefulscience.org/t/nathan-lents-how-did-the-eye-evolve/2441):
>
> Who said it would be ten steps?

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