Seth: These people lived on a planet in the same space that your planet now occupies...

Below is from Seth's outline for Seth Speaks (quoted by Jane in her introduction to the book where she said he stuck to his outline better than she ever did for her books, but this was not addressed in Speaks or anywhere in the material that I know of):

"Now. There will be a chapter on the religions of the world, on the distortions and truths within them; the three Christs; and some data concerning a lost religion (pause; one of many), belonging to a people of which you have no information. These people lived on a planet in the same space that your planet now occupies, in quotes 'before' your planet existed. They destroyed it through their own error, and here reincarnated when your planet was prepared. Their memories (long pause), became the basis for the birth of religion as you now think of it."

—TES9, Session 510, January 19, 1970

"They destroyed it [their planet] through their own error, and here reincarnated when your planet was prepared." This means people are older than planet earth. This is not a surprise if one accepts that consciousness gives rise to form, not form giving rise to consciousness. Per this, Seth has stated the theory of evolution is much a fairy tale as the Eden story, I believe in Seth Speaks.

Earth was prepared by way of consciousness.