Blonde hair, blue eyes

[Loki]

Evolution doesn't start from 1D but it starts from Mid-sixth D. In fact the Mid-sixth D exists before evolution starts but they do not have any experience acquired at that point. Which means Mid-sixth D (higher selves) could wait for their complexes to evolve slowly slowly undisturbed or they can enter from the side of evolution and genetically prepare better chemical bodies to speed up this evolution. This is why many Mid-sixth D had projects all over solar system trying to speed up evolution. Of course this interference ends up creating elites. And at least in the history of human race all these projects failed to become STO forcing some degree of separation between groups of people.

Ra is no different they already completed the first evolution from 1D to Mid-sixth D having acquired experiences they are talking about. As far I am concerned they could very well be our higher selves.