>Precursors exist.
>Forerunners rise, war and defeat Precursors, assume the Mantle as top dog.
>Humans rise, expand into Forerunner territory.
>Forerunners attack Humans, defeat Humans, realize Humans were fleeing from the Flood.
>Forerunners realize they can't beat Flood, but the Humans were able to.
>Didact hated Humans because they were the young up-and-comers and didn't want to pass the Mantle to them. Wanted to instead convert all Forerunners to data/machines to make themselves immune to the Flood. This only creates abominations, so they lock up the only supporter if it, Didact.
>Forerunners catalogue various races, including humans, fire the Halos, and leave the controls for Humans to be able to use, under the assumption that they would be the first race to approach the Forerunner level of technological advancement.
>Time passes, Humans rise again, Flood happens again, Didact is released and wants to enact his plan again.
I'm assuming some Forerunners must exist somewhere, otherwise why wouldn't they just catalogue themselves as well? Couldn't they have set the monitors to replant the seeds of their civilization after Halo was fired like they did for Humanity and the various other races? I assume they would be able to rise again and re-carry the Mantle.
And why did they refer to Humanity as the Reclaimers? Shouldn't they just be the Claimers? Is it implying we're the Precursors? As far as I know, Humans never "possessed the Mantle" instead of the Forerunners during their time. I know that Guilty Spark (or maybe it was Penitent Tangent) referred to Humanity as the children of his makers, but I assumed this was more in the sense of empires rising and falling to make way for the next. If Humanity had ever possessed the Mantle, I'd assume they'd be revered as rivals rather than children.