it's interesting to note that the fluoride content in the natural water sources in ethiopia - where we all come from - is amongst the highest in the world.

so, it's easy to say that we don't have fluoride in our natural occurring water, so it's "unnatural" to add it.

....except that, if you go to the rift valley, where we evolved, they do have fluoride naturally occurring in their water - and at higher levels then we add it, anywhere.