If only during the recent century all the money and energy spent on horoscopes would be spent on medicine instead, maybe 100 years could be now the average lifespan, and 150 years rather likely for those who take care to exercise and avoid sugar.

I don't think enough has been spent on horoscopes to do that much good. On the other hand, if people gave up on lotteries, that might have some impact.

I agree that figuring out how to teach rationality to people with average intelligence is an important goal, even if "Thinking Clearly for Dummies" is an amusing title.