There may be myriad other causes (on which I'm largely ignorant), but one reason cancer kills more people than it used to is that more people are living long en

There may be myriad other causes (on which I'm largely ignorant), but one reason cancer kills more people than it used to is that more people are living long enough to be killed by cancer instead of something else. It frequently takes a fair amount of time for the various micro-level problems in cells to develop into cancer, and then it takes some additional time for that cancer to get bad enough to kill you - which is why young people rarely die of it, and one reason why "death by cancer" will be rare when everyone dies of something else while they're still too young to have had much cancer risk.