Because he saw in it two separate trajectories for a dividing population. When he explains the pitchfork, Ra says that since their discovery, Neptune and Pluto have each been in Gate 14 only once, both within the Eden window since 1961, and that they are the only two planets that influence the way the species as a whole moves. The 14 powers the pitchfork that drives the Sphinx, so a planet there shapes direction itself. He then gives them different jobs: Neptune as the ring pass not of what is planetary to us, tied to the human line, and Pluto, with the bodies beyond it, as what will impact the Rave. He calls this a split in our evolution that is separate from the histidine mutation. Elsewhere he recalls Pluto sitting in the 14 during the first years he was teaching Human Design. Ra gives most of this only once, so treat the two trajectories as Ra's single reading rather than established mechanics.
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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