Hi everyone! This is my first post here and let me say you have the most amazing community. The 17th shard opened my eyes for so much things in the books that I have totally missed. Also, I would like to appologize for any mistakes I make as English is not my native language.
So, that said, I have this wild theory of mine....it may be completely foolish as my knowledge of the cosmere is really shallow, it seems. But here is what I think happened with the Recreance...
So the radiants figure out the humanity destroyed their planet and after been given some nice land on Roshar they go and invade all of it. Honor is in a pretty bad shape and maybe says something like "never mind, don't think about it, you have sworn to protect humanity, go and kill some Listeners.." Then the Skybreakers go like "you crazy fool, we are invaders, this is wrong, we think the Listeners should kill all humans available and we will not stop them from this. So long and thanks for all the fish". And puff, they fly in the sky and go somewhere else. I like to think they might go to the Shin land as this was the only place given to humanity. However, the rest of the Radiants are like "well, we have sworn to protect humanity, we can't simply leave them. And Honor says who cares what happened initially, he may be crazy and dying but he knows his stuff. But, we can't continue fighting, vaporizing second planet in a row would be a Very Bad Thing. We would rather go home and cut stone with our fancy swords and make houses" I personally can't imagine Kaladin doing anything to kill Syl, I can imagine him to destroy the entire planet for her well being. I don't think he is unique in this so really the Radiants killing their spren seems unimaginable. However, going somewhere to quietly live happily ever after seems pretty legid to me. Except for those who have no land to go - what happened to their home, anyway?
But, there is one big issue with this happily ever after plan - the listeners keep fighting, at least most of them - I think the ones that are found on the Shattered Plains were deserters, I can remember something about abandoning their gods. So what to do. I really think they saw one option here - Kill Them All and put an end. But the night presented a different solution...related to the unique abilities of the Bondsmiths. (I don't have the book in front of me to give you exact quotes, sorry). I think the Bondsmith here is the Third One we know nothing about. And also, this solution might have some nasty side effects. Pretty obvious to me, the solution is to do something to the listeners to stop them from bonding with spren and turn them to parshmen as we see them now. What a good idea. I don't think the side effects are the parshmen having less consciousness than a dog. I think this was part of the point, or at least no one would complain - better robot slave than dead, right. So in the morning, a field full of listeners and knights killing each other, the Bondsmith Does His Thing and as a result, we have a field full of parshmen. Stop fighting, go doing whatever you like. Yay! Except the side effects which I think were destroying all of the Nahel bonds around and killing every one of the spren. Therefore - the Recreance. I think this had quite a regional effect as we have the Skybreakers and we have the Listeners from the SP.
I might be completely wrong but I like the theory because: it aligns with Dalinar vision about the Recreance - they were fighting( with whom? - the listeners) and then they came and left the dead spren, no more listeners also; the skybreakers are still around but work for Odium now; the third bondsmith is nowhere around and has suffered enough - it even makes sense that the third bondsmith is not dead like the rest of the spren bonded at that time because he/she is the one that has done it. Or maybe IS dead?
Wow, what a long first post. Thank you for reading and please let me know if you think this is too wild guess on my side.