The Omega

[Februs]

Should the Ascians be in direct opposition to Allag imprisoning Primals--there's a contradiction. An unknown gang of Ascians specifically gave Allag "the means to entrap" Bahamut. There wasn't much room for interpretation in Tiamat's words.

Of this there is little doubt; however, that does not mean that the Ascians did not eventually come to the conclusion that this was a mistake. The reason being that the result was the exact opposite of what they intended.

You're right to point out that there is a trend to be seen here. Each era ends with the fall of an advanced civilization. However, you're overlooking what happened before that fall occurred. We know from the Crystal Tower quest line that before the fall of the Allgan Empire, they enjoyed a very long time of peace and prosperity. We have no way of knowing how long this peace lasted, but it was long enough for the Allagan's to become complacent and start to stagnate as a civilization. Because of this, and because they lacked strong leadership, Amon cloned Xande, and Xande went on to try and finish the conquest he started in his first life. This caused several uprisings and, eventually, the cataclysmic attempt to store all of Dalamud's power within the Crystal Tower in a last ditch effort to open the portal to the World of Darkness.

Before that cataclysm happened, though, the Allagans were at peace and had more than they could ever need. Primal threats were at a minimum and any that did occur were likely quickly subdued. 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 don't want to risk repeating what happened with the Allagans. To avoid the possibility of a future without Primals, it would make sense for them to withhold such technological support from any other civilization, no matter how warmongering that civilization is. The Garlean Empire, in particular, would seem like the last person they'd want to have such technologies, because they've already made it very clear that they are more than willing to destroy every primal they meet, as well as that primal's summoner in order to prevent any future summonings.

[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.

[Februs]

Objection!

Sustained lol.

You are correct.It is highly unlikely that the Allgan empire would have endured had Amon and Xande not made an even bigger mess of things given that it was already starting to decline ... however you're also kind of proving the rest of my point lol.

Like I said, we were openly told that, at it's peak, the Allagan civilization enjoyed peace and prosperity across its entire empire (which, by definition, would include its subjugated states as well). That prosperity was brought on by a limitless energy supplied by the Crystal Tower and Dalamud. This means that the prosperity the Allagans enjoyed, no matter how brief, was in part supplied by the technology they received (and likely modified) from the Ascians (oops).

We also cannot say that it was a short time of prosperity. Doga specified that it lasted for "generations." Note the use of a plural. That means a minimum of two generations, at least, in a civilization in which the average lifespan was likely quite long (due to their extreme advances in science and magic. Regardless, even if it was a short time, which is unlikely, I doubt that the Ascians were happy about it. Given that they want to cause as much destruction and drain as much aether out of the land as possible, any amount of prolonged peace is a bad thing for them, and they probably don't want to risk this happening a second time with any other civilization.

In fact, I can totally see them engineering the downfall of the Allgan Empire just to put a stop to it. Given their penchant for manipulation, it's possible that they started manipulating the people to spread decadence in the populace. It's also possible that they were the ones who put the idea of resurrecting Xande into Amon's head in the first place. Who knows, but I think it's a safe bet that they were pretty happy to see the Crystal Tower destroy the entire civilization.