The key word there is practically. If any Leveller ever came close to succeeding, there would be no humanity.
It is entirely impossible for humanity to rebuild itself to the level that they have in only a thousand years. Humanity on earth took millennia to reach the state of technology that the world of Myth enjoys. Even with the aid of magic and other races (especially the Dwarves), a state of unity over such a great area wasn't reached in our society for even longer.
The 'armageddon' that Myth seems to speak of is a destruction of the world as humans know it- but not a destruction of the entire world. Releasing the Myrkridia would destroy humanity- yes- but not the world.
SB's plan, realistically, wouldn't kill the world like he'd have hoped anyway- but the fact that he's intent on destroying a large portion of the world- as opposed to simply wiping opposition for it is different. True, Moagim released Myrks. Balor seemed intent on destroying humanity as well.
'Seeking not to conquer- but to destroy' works even if they don't intend to 'kill the whole world'. Humans are sadly narrow-minded. The loss of their civilisation is the 'end of the world', and I think that's what the catch-phrase is alluding to. Not that the Fallen Lords want to 'destroy the world' but to 'destroy civilisation'.
There's a big difference there, folks.
LR
