Originally Posted by jamaca
you also raise an interesting point with the inevitibility of benders being/becomming greater than normal citizens, I for one wonder why the vast majority of society isnt already benders? from a evolutionary point of view of natural selection and sexual selection (bender is hot no?) would benders not take over the majority of the gene pool given enough time, even if benders produce non bending children?
the ruling class in both avatars. in case you didn't notice, the council consists of nothing but benders.
Bending does seem genetic, seeing as how all air benders are now related to the avatar from avatar 1.
So let's go with genetic point of view:
1. Certain genes make up the ability for an individual to bend a certain element. This would mean the genes are seperate between element benders.
2. it could be that there's a pool of genes that, when a certain combination is achieved an ability to bend a particular element is granted.
Either case, this could also mean, that should there be a bender with an affinity for more than 1 element, it would die as a foetus, or have no bending at all: Overdominance
The avatar could be explained that the required genes are numerous enough to make the chance of an avatar appearing 1/x-billion, due to there being only a single possible way the genes could arrange themselves to work in a working order.
or... ofcourse, magic.
Anyhow, if bending is genetic, the only reason everyone's not a bender is because of overdominance of the genes.
Back to the series:
Either the benders crack down on all non-benders or the non-benders will win eventually.
Also, i've had my suspicions that the mask guy is an avatar himself. Seeing as avatar 1 removed the big bad firebenders ability to bend fire with avatar power.
If the mask guy is an avatar himself, the genetics would fit perfectly.