The history of the Great Abyssal Tree is long, complex and filled with tragedy, wars and numerous catastrophes. The known parts of it began after the Fragmentation Event - no preserved information prior to that cosmic cataclysm exists. Since that day, the Great Abyssal Tree has seen many civilizations of mortals rise and fall, and various factions of the Alphas form and dissolve. While humanity has always attempted to record its history, the results were mostly inaccurate and marred in politics and censorship; the record-keeping of Kin, on the other hand, neglectfully disregarded any events they deemed "unimportant". These issues produced a peculiar problem: in modern days, most of the archives are incomplete and present two interwoven recorded histories - mortal and Kin - with various gaps and missing information in both.
The known history is segmented in four distinct Eras, each representing a major period of time marked by a certain quality. While the dates of the mortal calendars are often argued about and adjusted, the timeline of the Alphas is mostly accurate - but even then there are certain events that can't be reliably placed.