The Good Lord has a lot to do with it. 1600.... Leading Naturopath said " More people have died from their own teeth than all the past wars in human history." He was also a Christian. I had a Great Uncle who died at 96 jacking up his barn in Greenfield, MA ( up on the Mohawk Trail). Barn fell on him and crushed him! Father says he drank a qt of bourbon every day of his life! Your statement is a contradiction: if a person eats junk,smokes and drinks and lives to old age he has great Genetics!