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I think the whole reason why cancer deaths aren't receding as fast as we'd like them to is exactly that heart disease deaths, and violent deaths (anything from murder to suicide to a car accident) are receding quickly. Therefore, people live longer, and get cancer with higher probability.

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Right, it would make much more sense to talk about cancer diagnosis or survivability by a certain age, like 50 or 60. By 70-90 most people have been exposed to so many carcinogens the likelihood of some sort of cancer is near guaranteed.

It's not even carcinogens. Cellular decay is a thing. As we age, our genetics start breaking down due to imperfect copying. Cancer is basically just bugs in DNA's software.

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