Me earlier:
Unless fluoridation is the only thing that changed in the last 100 years, this doesn’t math.
(This was a cheap shot for comic effect, and the original comment referred to modern society in general rather than only fluoridation. However, it didn’t account for longer life expectancy and higher diagnosis rates also contributing to the increase in the number of deaths attributed to cancer rather than solely the ills of modern society. So it still doesn’t math.)