Recently, I watched a fascinating documentary about a tiny town in Pennsylvania known as Roseto. Founded in the 1800s by a group of Italian immigrants, the town quickly began to flourish as more and more people from their original village emigrated from Italy. At first blush, it seemed like a rather non-descript little place. Except for one strange detail that came to light in the 1950s. The Rosetans were seemingly in perfect health with a near zero mortality rate from heart attack or heart disease. The statistics were almost too staggering to be true. Stewart Wolf, a doctor from Oklahoma, flew to Roseto to study its people and investigate this phenomenon in the late 1950s and 1960s. Wolf studied whether genetics could be a variable, but in fact the local Rosetans proved healthier and far stronger than those that had emigrated from the same Italian village, but lived elsewhere in the United States. He studied their diet and exercise habits. But many Rosetans drank and smo...