The History of Magic after the Fall of Zeal Part 1: From the Fall of zeal to the prelude of Asteria's rise to power (excerpt):
Part 1: 12000 BC to 11975 BC; Survivors gradually rebuild new society Most Humans lose their Magical abilities but, those who few had Innate magic or learned Elemental magic can still use them (Dalton and his goons could still use magic in CT). Janus Returns and settles in this era. He battles with Dalton who settles in an abandoned palace that resurfaces several years after the disaster. At the end of this period Dalton is defeated and Janus creates a Knights of the roundable type-organization to regulate Remaining Magic use and artifacts. Afterwards as more landmasses emerge from beneath the waves, these areas are settled by humans in masse. The area of the original last village is abandoned by humans as is eventually settled by mystics.
Part 2: 11975 BC to 9200 BC; Remaining Magic continues to dwindle although occassional magic innates are found in each generation due to the gene resurfacing occasionally. Innates are sent to the Rountable Keep to be trained, The Knights of the roundtable gradually becomes something more akin to the medieval church. Toward the End of this period The First elemental crystals are rediscovered after having been lost to history since the fall of zeal. Another discovery is that the ground and minerals in areas in the vicinity of the crystals have mineable magic that can unlock the latent ancestral magic use in humans that has been lost since shortly after the fall of zeal. Attempts by the church to suppress this discovery leads to the next era.
Part 3: 9200 BC to 9000 BC. The Unlocking wars, this was an era of religious types wars fought over the right to unlock magic using the new minerals dubbed "magicite", This pitted the forces loyal to the Church against the reformists. Eventually the reformists triumphed in 9000 BC and the hold of the Church was broken. The Church cedes the right to unlock magic but shortly afterwards their leadership flees en masse to the Forest of Trucania in western forests of the Northwestern continent where they become a spirtual type order. There they build the ecclesitiastical city of Trucania where the Church leaders reside and keep their most cherished knowledge (as well as those dangerous knowledges to prevent them from falling into the wrong hands) , the church remnants in Trucania are protected by the Kingdom of baron which is located in the eastern part of the same continent (Baron is located where the city of truce is located in a much later era with Baron castle being where truce canyon/millennial fair is at). Wholesale advancement in new tech capable of unlocking latent magical abilities occurs. After the Unlocking wars the return of Peace as well as technological advancement facilitates new trade Networks. Chocobos become a primary mode of transportation.
Part 4: 9000 BC to 7650 BC. With the collapse of Church rule, magicite use and exploitation becomes a more freely used commodity. The discovery of More magicite deposits results in the discovery of More and More Crystals until eventually All eight have been rediscovered. Various Local wars break out over magicite deposits and over possession of the crystals. This Results in the Growth of Military grade Magic (known as "magitek") and partially successful attempt to reverse engineer magic into technology. Success is also made infusing magic into select warriors. This marks the beginning of an arms race between the nations of the world. Toward the end of this period the magic renaissance takes and even darker turn however, after the discovery around 8000 BC of the ability to cobble together monster parts to glean out magic use from said parts, this becomes known as "Synthetic Magicite" or Spiritnite. Raiding of Mystic settlements to kidnap people for spirtnite nearly causes all out war, however due to heavy losses on both sides, a larger war is avoided, however a "spirtnite shipping trade" develops as mystic criminals, dissidents and the occasional kidnapped wayward fiend are shipped to human settlements to be killed or sometimes used as living weapons. The Spritnite trade is dominated by the New Floating city of Cloud carpet (located over the oceans between the central continent and the Choras continent, the city is able float due to being powered by the air crystal), later on the growing kingdom of Babel (located in the central Continent) becomes a major customer of the Cloud Carpet Traffickers. Toward the very end of this period the Kingdom of Babel Proclaims itself an empire and begins local campaigns against other polities on the central continent with the objective of forced unification.