Outliers

In the Introduction to Outliers, "The Roseto Mystery," Gladwell begins by explaining how the residents of the Italian town of Roseto immigrated to Pennsylvania in the late 19th century. The community of immigrants, led by an enterprising priest named Father Pasquale de Niscio, built a small yet energetic town. But in the 1950s, Roseto gained a measure of fame among medical experts for a very different reason. As physician Stewart Wolf discovered, Roseto had an astonishing low incidence of heart disease in residents under 65.