Socrates as Mother Nature

I've started reading the Theaetetus and I'm keeping to the strategy that I first began trying out with Aristotle's De Anima: I'm trying to see how far I can go with the notion that the Socratics understood the theory of natural selection and believed it was decisive for determining the nature of mind and thought. The Theaetetus seems to invite me to think that Plato was an evolutionist. Socrates in his role as "midwife" models natural selection. One knows a wind-egg because the midwife carries it away; one knows a fertile egg because the midwife doesn't carry it away. As far as I know, in the context of the extended metaphor, no standard other than the midwife's selection is advanced for our knowing the viability of an egg.

The Protagoreans wish to maintain that knowledge and truth are perception and that all perceptions are true. At the same time, they want to maintain that they are wise and that, somehow, some opinions are better than others. What they appear to lack is a standard for the superiority of one truth of this kind over another such truth. The "midwife," natural selection, seems to be what makes the difference between good perceptions and bad perceptions.

I come around to Nietzsche again, as anyone who knows me ought to have predicted I would. I'm reminded of his assertion that he has his truth, while we have ours. He wasn't being democratic or polite; he was claiming that his understanding was superior to our own and that on that account, he had a profound interpretation that we couldn't understand. His truth couldn't be our truth, because we aren't smart enough. His perspectivalism wasn't egalitarian, just as the Protagorean perspectivalism as Socrates portrays it in the Theaetetus wasn't egalitarian.