Digmas Tassuula is an ancient faith, though to maintain its longevity it has adapted in an almost Darwinian fashion to the needs and selective pressures of the times. It, like Kai’Siri society as a whole, is the sum of its history, and trends over time in the culture.
It is the basis for Kai’Siri nationalism, the force behind their drive for empire. Ethnic Kai’Siri alone are permitted as members, whether converts or through upbringing. Digmas Tassuula’s prime dictum is this:
Spread the culture of our species to the stars, to all peoples, to all worlds, but the Faith of our people is ours and ours alone. None but we may lay claim to it.
It would be foolish for this religion not to have a means of perpetuating itself. It does so mainly through its promotion of pride in a national identity binding the Kai’Siri race together.
Digmas Tassuula has no gods, no beings that are prayed to, invoked, or worshipped, unlike some prominent Terran religions originating on that world’s Eastern Hemisphere. It does, however, have a mythology that describes ancient beings it calls the Strangers, who are said to have brought humans from Terra to Sirug long ago, and taught them the basis of civilization and high culture, enjoining them to spread these across the galaxy.
Digmas Tassuula requires no belief in any sort of supernaturalism, and postulates no such entities or miraculous events as historically or factually true. Kai’Siri are a critically thinking culture, and know the dangers of oversimplification, reification and literalism in one’s belief structure.
The early history of the religion was not always so rationalist in its outlook, and it was largely the social consequences of this which led to its current state. The most recent reaction was several millennia back, just following the Third Sirugian Dark Age, when planetary war and human dieback from repressive social policies instituted by religious authorities nearly destroyed civilization and spurred massive reforms by the survivors.
What of its future? Well, at the moment it shares the landscape of belief with several other less practiced and more secretive mystery religions, including the Hidden Order of the Orugruuta, an extreme nationalist sect responsible for the project that created three of the four wielders of the near-legendary Prime Shards; the Mirus, the Fractus, and the Magna, beings of formidable power. One day, it could be eclipsed by that one or some other, even more extreme sect.
But for now, Digmas Tassuula is the main player where religion is concerned, and where the majority of Kai’Siri direct their faith and ideological fervor, a tricky thing to balance with their rationalism. Then again, Kai’Siri are humans, so that shouldn’t be surprising.