Just thinking about updating this topic. Of course there's Tolkien. Besides that, here's a few things that came to mind:
Dante - Bakker depicts ciphrang and Ajokli as hungers, eternally eating. This hearkens back to the very bottom of Dante's hell where the three-headed Satan gnaws on three souls forever: Brutus, Cassius, and Judas. The passage:
The Emperor of the kingdom dolorous
From his mid-breast forth issued from the ice;
And better with a giant I compare
Than do the giants with those arms of his;
Consider now how great must be that whole,
Which unto such a part conforms itself.
Were he as fair once, as he now is foul,
And lifted up his brow against his Maker,
Well may proceed from him all tribulation.
O, what a marvel it appeared to me,
When I beheld three faces on his head!
The one in front, and that vermilion was;
Two were the others, that were joined with this
Above the middle part of either shoulder,
And they were joined together at the crest;
And the right-hand one seemed 'twixt white and yellow;
The left was such to look upon as those
Who come from where the Nile falls valley-ward.
Underneath each came forth two mighty wings,
Such as befitting were so great a bird;
Sails of the sea I never saw so large.
No feathers had they, but as of a bat
Their fashion was; and he was waving them,
So that three winds proceeded forth therefrom.
Thereby Cocytus wholly was congealed.
With six eyes did he weep, and down three chins
Trickled the tear-drops and the bloody drivel.
At every mouth he with his teeth was crunching
A sinner, in the manner of a brake,
So that he three of them tormented thus.
To him in front the biting was as naught
Unto the clawing, for sometimes the spine
Utterly stripped of all the skin remained.
"That soul up there which has the greatest pain,"
The Master said, "is Judas Iscariot;
With head inside, he plies his legs without.
Of the two others, who head downward are,
The one who hangs from the black jowl is Brutus;
See how he writhes himself, and speaks no word.
And the other, who so stalwart seems, is Cassius.
But night is reascending, and 'tis time
That we depart, for we have seen the whole."
https://www.gutenberg.org/files/1001/1001-h/1001-h.htmOther influences - it seems that Bakker has taken the ethical views of Kant and Mill and set them up as opposite pairs, divine and damned, feminine and masculine. Mill's utilitarianism *uses* and thus Kellhus is more damned than all others. Kant focuses on the inviolable laws of conduct represented by Mimara. Of course it's more complicated and messier than an on/off switch, Akka says as much referencing X, but using/not-using seem to be the polarities forming the ultimate morality of Earwa.
I want to write about mechanismism from Descartes and Hobbes' clockwork people but back to work now.