People of P8X-412 are a race of humans on the planet P8X-412. Previously, the people were slaves of the Goa'uld Qetesh. The people lived in isolation and therefore did not know that the Goa'uld had been defeated and their empire had fallen. Four years earlier, before SG-1 visited the planet so Vala Mal Doran ruled planet by pretending to be Qetesh. In 2005, Vala and SG-1 visited the planet so people lived in poverty. When Vala revealed that she was not Qetesh so they but her in jail them before, but then released them to her.
Before SG-1 came to P8X-412, the people had been visited by a Prior who told them about the Ori. SG-1 tried to prevent people from worshiping the Ori, but failed when the Prior unleashed a plague on the people. The Prior healed them and the people began to worship the Ori. (SG1: "The Powers That Be")
In 2007, when SG-1 used the Ark of Truth in order to prove to the Priors that the Ori were not gods and that they were dead. Consequently, the people of P8X-412 were freed from the Ori. (Stargate: The Ark of Truth)