There are seven Root Races in the Terrestrial Round.
Beings had perfected their astral body in the Lunar Round, but were in need of a physical body to achieve a perfect material experience.
A Root-Race begins and develops at several places, and seven groups of this Race emerge at seven different parts of the Globe.
Always it occurred this way, since the first Root-Race.
The Moon is the planet that during its Round develops the ethereal and astral form of the human monads and, when its cycle of evolution ends, leaves its heritage of acquired experience to the Earth, her daughter.