Flouride was one of the original conspiracy theories around the same time as the conspiracy theory that the State Department was full of communists.
Good discussion on flouridation here:
It was a corporate conspiracy, actually—Alcoa was the bad actor.
Our family is from the Texas-Oklahoma-New Mexico areas. In our early years we were raised on well water with natural fluoride and have great teeth.
I’m 72 and still have mine. Same for wife and kids. A few cavities in our early years but still can chew a steak real easy.
But then, that was NATURAL fluoride.