Who is The Natives from Shikasta: Re, Colonised Planet 5: Personal, Psychological, Historical... and what is their importance?

The "Natives" are humans. The species that achieved sentience through evolution on Shikasta. They have lived in harmony with one another for ages, but as the SOWF flow breaks down, humanity begins to decay into a race of savages with short lives, disease, war, and hatred. Their birth, rise, fall and rebirth is the story of Shikasta.