Ichiro Kawachi is a Professor of Social Epidemiology in the Department of Society, Human Development, and Health at the Harvard School of Public Health. He is also Director of the Harvard Center for Society and Health. He has authored several books with Oxford University Press and New Press on society and health.S.V. Subramanian is an Assistant Professor in the Department of Society, Human Development and Health at the Harvard School of Public Health. He has a PhD in geography with specialization in multilevel statistical methods, and he also has a master's degree in the field of development studies.Daniel Kim is a Canadian Institutes of Health Research Postdoctoral Research Fellow in the… Department of Society, Human Development, and Health at the Harvard School of Public Health. Dr. Kim completed his medical degree, master's degree in epidemiology, and medical residency training in community medicine, all at the University of Toronto, and a Master of Public Health degree from the Harvard School of Public Health. He is also currently completing his Doctor of Public Health degree at the Harvard School of Public Health.