Theology and Trinitology
Though Trinitarianism in 425 CE was a relatively young religion, there was already lively debate among its scholars. In particular, Trinitology (study of the nature of the Trinity) and Theology in its strict definition (study of the nature of G-d) became popular among the theologians of Sebayik's markets.
Theology
In Theology at the time there were two main ideologies in circulation, namely Monology and Prosthesiotheology. Neither is truly dominant, and though general assumptions are possible about that demographics that adhered to each, the divisions between Monologists and Prosthesiotheologists are rather vague and most certainly not bitter.
Monology
For the Monologists (believers in singularity) there was the Blessed Trinity and only the Blessed Trinity. They asserted that there could be no other divinity, often quoting Membertou, "Here me, my disciples! The Trinity is supreme, the Trinity is alone! Blessed be their majesty now and forever!" (Sayings II, 4). This Theology was most popular among scholars, although the majority of White converts (admitadly few in number), also adhered to Monolgoy.
Prosthesiotheology
According to Prosthesiotheology (belief in additional g-ds) there was the Blessed Trinity above all, but there were also lesser deities. For them, the world was too diverse, to awe inspiring, for it all to come down to a simple trinity was simply impossible. Often, prosthesiotheologists mention another qutoe of Membertou, "Look to the world around you, and you will see the diversity of divinity, the multitude of blessings bestowed upon us." (Sayings II, 7). While an attractive quote, scholars oftend dismissed it due to few if any other quotes being usable for the same purpose as well as the ambiguous nature of the quote. For this reason and others, Prosthesiotheology was for the most part found among frontier peasents, though a significant number of scholars adhered to it as well as a large part of the nobility.
Trinitology
Unlike Theology, Trinitology's different ideologies are not very defined. Scholars and lay people often placed themselves in neither category difinitively, often developing their own particular combonation of the ideologies. It was also difficult to predict a person's ideology based on demographics, but in general peasents and lay people, in particular frontier peasents, were more likely to be Dividians.
Dividianism
Dividianism, the more popular of the two at the time but by no means dominant, taught that each member of the Trinity, Mother Moon, Mother Earth, and Mother Sea, were each completely unique and individual deities. Just as the pre-revelation beliefs had different deities, so were the Sacred Mothers. This was the most common belief among the masses, but even at the time more developed theologies were begining to trickle down. There were, however, a number of scholars who continued to side with Dividianism.
Unitarianism
Unitarianism was developed by the scholars in the markets of Sebayik, where the greatest thinkers in all the Dawn Lands gathered and taught. The Unitarians came to believe that the Trinity was not simply three distinct deities, but rather a single deity in three parts. While originally confined solely to scholars, the ideology began to become popular as it trickled down, in particular among seamen. White converts also seemed to prefer the theology to Dividianism.