Wasn't the original premise that humans created the cylons and they rose up against the humans and declared nuclear war on the 12 colonies. So who created the 13th tribe of cylons? Which came first the chicken or the egg so to speak?
In this particular incarnation of BSG, I don't think we've been told yet who created the cylons that were on Kobol and left and ended up on Earth...
It has all happened before and will all happen again...
I would take the tag line as meaning there was a human cylon war long ago, before current history. Some humans and cylons became partners (like now) and split their ways and formed colonies. Then the humans once again created cylons. They evolved and started the first war in the current history. The cylons are already talking of splitting off from the alliance and starting again.
Yes, this is how I pretty much understand it.
"It has happened before, it will happen again."
The 12 tribes on Kobol "created" (this is my theory) the 13th tribe or the Kobol Cylons (KC). There was some sort of division between the 12 tribes and the KC which prompted the exodus of Kobol. I have a feeling it had something to do with the fact that the KC believed in one god where the 12 tribes did not.
So this was the first cycle ...
The KC find earth taking with them resurrection technology. However, somewhere along the line they start procreating versus resurrection and resurrection technology is abandoned.
With that being said, the KC start making Earth Cylons (EC), and even EC skinjobs. Saul on Earth first picks up on this. So the 5 (Saul, Ellen and crew), anticipating a war look into resurrection technology as a mean to ensure their survival during the war. Sure enough, the war breaks out and they are resurrected.
"It has happened before, it will happen again." This was the second cycle ...
The 5 realizing this cycle figure the 12 colonies will eventually create their own cylons, the 12 colony cylons (12CC), so they race as best they can to find them to warn them.
However, while they are on route, sure enough the 12 colonies create the 12CCs. Which results in the war.
"It has happened before, it will happen again." This is the third cycle ...
The 5 arrive and convince the 12CCs to stop the war if they give them resurrection technology in hopes to break the cycle.
Cavil however has other intentions and eventually convinces (or reprograms) all skinjobs that their human "parents" need to be wiped out. The 5 object. Cavil tricks the 5, kills them, and places them throughout the colonies to "give them a first hand view of the holocaust" and to "teach them a lesson".
The cylons however have their own civil war ...
"It has happened before, it will happen again."
Where did the humans on Kolob come from? Are they descendants of cylons even before them? All I can say is:
"It has happened before, it will happen again."
