The supposed representatives of the Priest-Kings in Gorean society. They are responsible for guiding the spiritual life of Goreans through their rituals and prayers to the Priest-Kings. Some are rumored to have the ability to call down the wrath of the Priest Kings, or the dreaded "Flame Death," upon those who commit blasphemous acts or who conspire against the Priest Kings. They are recognised by their white robes, their shaven heads and faces, and their refusal to eat meat or imbibe alcohol. They are also required by their caste codes to be celibate. They tend to be learned and well-read, although they are feared and often distrusted by those of the lower castes. Their caste color is White.

"In the next flash of lightning I saw the white robes of an Initiate, the shaven head and the sad eyes of one of the Blessed Caste, servants it is said of the Priest-Kings themselves. He stood with his arms in his robe, tall on the road, watching me." Outlaw of Gor, page 40

They are the scholars of Gorean society, the writers and the historians. In their keeping is almost all of the accounting, record-keeping, and writing upon Gor. They tend to be serious and studious, with an attention to detail and a passion for knowledge. Sub-classes of this caste include the caste of Mapmakers (explorers), the caste of Magistrates and the caste of Litigators. Their caste color is Blue.

"Many castes, incidentally, have branches and divisions. Lawyers and Scholars, for example, and Record Keepers, Teachers, Clerks, Historians and Accountants are all Scribes." Assassin of Gor, page 208

" 'Ho!' cried Torm, that most improbable member of the Caste of Scribes, throwing his blue robes over his head..." Tarnsman of Gor, page 36

This caste includes architects, engineers, draftsmen, stonemasons, and many other professions which concern themselves with the creation of the physical and engineering marvels of Gor. Also among the caste of Builders are the inventors and technicians who develop such works. Their caste color is Yellow.

"On the other hand, the High Castes, specifically the Warriors, Builders, Scribes, Initiates, and Physicians...." Tarnsman of Gor, page 41

This is the caste of those who concern themselves with the healing arts. Surgeons, apothecaries, medical researchers and health practicioners are all members of this caste. Universally recognized as non-combatants during time of war. Their caste color is Green.

...On the first day the physician, a quiet man in the green garments of his caste, examined me, thoroughly. The instruments he used, the tests he performed, the samples he required were not unlike those of Earth. Of special interest to me was the fact that this room, primitive though it might be, was lit by what, in Gorean, is called an energy bulb, an invention of the Builders. I could see neither cords nor battery cases. Yet the room was filled with a soft, gentle white light, which the physician could regulate by rotating the base of the bulb. Further, certain pieces of his instrumentation were clearly far from primitive. For example, there was a small machine with gauges and dials. In this he would place slides, containing drops of blood and urine, flecks of tissue, a strand of hair. With a stylus he would note readings on the machine, and, on the small screen at the top of the machine, I saw, vastly enlarged, what reminded me of an image witnessed under a microscope. ... Captive of Gor, 8:92-93

This caste includes infantry, tharlarion cavalry, and tarnsmen. They are known to have one of the strictest sets of caste codes in use on Gor. Members of this caste comprise the military branch of Gorean government. Their caste color is Scarlet.

"These tiers shared the color of that portion of the wall behind them, the caste colors.The tier nearest the floor, which denoted some preferential status, the white tier, was occupied by the Initiates, Interpreters of the Will of the Priest Kings. In order, the ascending tiers; blue, yellow, green and red were occupied by representatives of the Scribes, Builders, Physicians, and Warriors." Tarnsman of Gor, page 61