Why was earth 3D STS?

[Aaron]

It's not/wasn't. We live on a mixed polarity planet, with very few achieving harvestability in either direction.

38.7 Questioner: Could you give me an example of a planet of this nature, both a third-density service-to-others type and a third-density self-service type at this level of, of attainment conditions?

Ra: I am Ra. As far as we are aware there are no negatively oriented third-density social memory complexes. Positively oriented social memory complexes of third density are not unheard of but quite rare. However, an entity from the star Sirius’ planetary body has approached this planetary body twice. This entity is late third-density and is part of a third-density social memory complex. This has been referred to in the previous material. The social memory complex is properly a fourth-density phenomenon.