Gigas and Sephirot - possible connection?

[Hinoto-no-Ryuji]

The "flaw" being human ambition. My headcanon for post-Calamity Allag is that they went the way of many a doomed precusor civilization and decided it was their duty to correct the inborn flaws of humanity to prevent another disaster. By, you know, tampering with the source code for the sake of genetically lobotomizing the species. As long as they don't do it for Evil™, it's fine right?

Except instead of learning humility and peaceful coexistence by being cut off from the works of their ancestors, this new race had perhaps the largest chip on its shoulder the world would ever see, and a whole lot to prove.

Personally, I really REALLY hope this doesn't end up being the case. I'd much rather the flaws of the Garlean empire be a human nature thing, rather than some genetic predisposition. It's unnecessary, for starters - nothing about Garlemald's ambitions are so unprecedented in history, both real and Hydaelynian, that they require some kind of supernatural (for lack of a better word) explanation. As such, a twist like that would detract from the story much more than it would contribute, not in the least by completely dehumanizing our conflict with them.

[Fenral]

I'd much rather the flaws of the Garlean empire be a human nature thing, rather than some genetic predisposition.

I think I miscommunicated my point. What I meant is that (hypothetically speaking) it's exactly a human nature thing: they were altered in a way that was supposed to make them less warlike, or at least unable to commit the magical atrocities of their forbears, but it didn't actually change anything aside from giving them a genetic disadvantage (inability to manipulate aether) that they would have to struggle extra to compensate for. Garleans are a race of Muggles in a world where everyone but them is born a wizard, almost like the world itself wants them to fail. Pretty much everything they do is to prove they can succeed in spite that major handicap. By trying to limit their creations' potential for violence, the Allagans (or whatever civilization) instead only proved that conflict and struggle and ambition are all parts of what it means to be human.

But it's a silly headcanon anyway, so nobody needs to take it seriously.