1. Professor Sir Michael Marmot is a professor of epidemiology at University College London and director of the University College London Institute of Health Equity, both in the United Kingdom, and past president of the World Medical Association. Alan Weil () is editor-in-chief of Health Affairs, in Bethesda, Maryland. This is an open access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY 4.0) license, which permits others to distribute, remix, adapt, and build...