If your read carefully, you'll note that I said largely. There is clearly a genetic component and non-lifestyle environmental factors. You don't need to go bac

If your read carefully, you'll note that I said largely. There is clearly a genetic component and non-lifestyle environmental factors. You don't need to go back to the 1970s even. In 1990 fewer than 5% of Americans had Type II diabetes and now that number probably exceeds 15%.