Editors’ Note: This post marks the launch of a month-long forum on the huge trends that will shape the need for and delivery of health care throughout the world for decades. In recent weeks, we have talked with a wide variety of people: executives at major pharmaceutical companies and care providers, scientists and inventors, academics at medical and business schools, experts in government agencies and NGOs, and practicing physicians. From these discussions, we have distilled our list of 12 megatrends. During the coming weeks, many of the experts we interviewed will be posting blogs. We encourage you to join in the discussion.