A Question I've Always Had On The Races...

[TheVigilant]

basically

lions + tiger = ligers
horses + donkey = mule/hinny
wolf + dog = wolfdog

most of these hybrids are pretty viable but also incapable of further reproducing. While any two races might be able to have a child, there could be some genetic health issues that come up. This along with whatever racial strife exists in the lore is why you generally wouldn't want to intermingle.

An interesting way of thinking but unless we have proof from the game, this is merely a conjecture.
We're applying real life biology to a fantasy world without evidence from the game itself.

[OranKells]

An interesting way of thinking but unless we have proof from the game, this is merely a conjecture.
We're applying real life biology to a fantasy world without evidence from the game itself.

okay the real reason is that devs do not want to make the 40+ new character models would be needed to make each hybrid. but if you're looking for a lore reason its a combination of racial/cultural tensions and biology 101