The Omega

[Fenral]

If it wasn't for Amon and Xande, it's entirely possible that the Allgan Empire would have just kept along without any conflicts whatsoever, sharing the warm light of civilization and boundless resources with everyone and anyone. Obviously, that would be unacceptable to an Ascian. With that in mind, it's very likely that they'd want to avoid any such possibilities in the future, especially with a race of people who would be willing to completely snuff out any Primal threats by eliminating the entire summoning race.

Objection!

(bolded for emphasis)

The Allagan Empire reached its zenith long before our kind came into being.
In that glorious age, the Crystal Tower stood tall as the symbol of Allagan pride. Parents took their children there, that they might learn how the nigh limitless energy it produced brought prosperity to the whole empire.

That prosperity, however, bred decadence, and the empire began to show signs of stagnation. This decline was made all the more rapid for want of strong leadership.
In a matter of generations, the Allagan civilization became a pale shadow of its former self. Its once gleaming cities fell into disrepair, and its frontier lands were given over to the wilderness.

I'm sorry, but that doesn't sound like an enduring, perfect society to me. Alas, their decline was a real, tangible event, not just paranoid fearmongering. It was also fairly short, as it took mere generations for the decline to become apparent.

Which actually makes it all the more interesting if the Ascians' original plan was to save the declining Allagan society, and it backfired.