The larynx mutation in Gate 12 is his reference point for scale. He dates it roughly 85,000 to 90,000 years back, describes it as the dropping of the larynx that made articulated speech possible, and treats it as the change that gave humans their strategic advantage: information shared quickly and over distance. He calls the Solar Plexus mutation the last major biological mutation of this form and puts it in the same class. The comparison also carries his claim about the Raves, since he expects them to have no need for speech in our sense because, as he puts it, they are the penta. It is worth keeping the register straight. These are statements from Human Design cosmology about how Ra read the graph, not findings from paleoanthropology, and the dates come from his teaching rather than from a laboratory.
This is not a fact, not medical advice and not a promise of healing. It is part of the cosmology Ra Uru Hu, who founded Human Design, left behind, and nobody knows exactly how it will unfold.
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