With little doubt, heredity does play a role. But, just because a non-smoker can still get lung cancer, should we smoke? Start with the population centers with

With little doubt, heredity does play a role. But, just because a non-smoker can still get lung cancer, should we smoke? Start with the population centers with low rates of Alzheimer's and dementia and work backwards. Even if some behaviors prove to be irrelevant, they may prove worth it for those with a genetic history of the disease.