Could the beast tribes all have been artificially created? [3.0 Spoilers]

[treuhavik]

So unless mortal Bahamut (and assumedly the dragons across Hydaelyn) caused the Calamity of Fire, then there's likely no connection between Bahamut and the 3rd Umbral Calamity.

Yep! That's exactly what I was suggesting. Though, a nameless, palmate-antlered fellow may have found some evidence to indicate that the disaster of which the moogles speak happened much earlier than the third umbral era. 98.876599876% sure that it was a "Calamity", however.