Quote Originally Posted by Dagroth View Post
Eberron relies on a number of very specific conceits that don't exist in other fantasy worlds. Dragonmarks, for one.

Oh, and Eberron has Peasants that are never anything but Peasants too! It has ruling classes that are interested in doing nothing but keeping the Status Quo too!
It also has scary badass epic dragons that will scry & die your ass if you try to defy your fate, because the Draconic Prophecy is a thing there.
So if anything it's even less likely to have significant chance.

The same is true for FR. The gods explicitly prevent the kind of progress they don't want.
If they don't want you to do something then that something will just suddenly not work, no matter what "science" or "common sense" say.
There's also always the "curbstomped by outsiders/fanatics/Thayans/Zhentarim/Yuan-Ti/etc" option. Because there's lots of factions who either like the status quo as it is or want to change the status quo their way, not yours.