I think the shocker will be that 4th density isn't cupcakes and rainbows...

[Bring4th_Austin]

According to Ra, the reason earth will become a 4D positive planet is because it was decided as much by the Council of Saturn, or by the beings who abide in the realms above our own.

I don't remember Ra saying anything like this. When Don asked why Earth would be 4D+, they said that this was because the positive harvest was much greater than the negative harvest (17.23). They also said that our local Logos skewed our archetypal mind to slightly favor positive polarization rather than negative (100.8).