Tracy Kidder

Paul Farmer has helped to build amazing health care system in one of the poorest areas of Haiti. He founded Partners in Health, which serves the destitute and the sick in many parts of the world from Haiti to Boston and from Russia to Peru.

By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning.