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Catherine Caldwell-Harris's avatar

When migrating, our ancestors appreciated the group member who would have been content to walk a bit away from the group, listening for rushing water, or who could stand by an open cave and use scent to estimate whether a predator had recently slept inside.

But I don't agree that sensory abilities were the primary driver of the autistic phenotype. What is the source of the claim: "90% of ASDers are challenged with sensory overload..." If it is 90%,then some of those sensory sensitivities are mild and overlap with the distribution found in allistic populations. The other main driver of the autistic phenotype was achieving high analytic intelligence while minimizing the excesses of hyper-sociality. It was fitness-enhancing to devote brain power to systemizing the natural world, thus facilitating inventions in weapons, large-scale navigation, and the domestication of animals.

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