Which inequalities in longevity and health among individuals, groups, and nations are unfair? And what priority should health policy attach to narrowing them? These essays by philosophers, economists, epidemiologists, and physicians attempt to determine how health inequalities should be conceptualized, measured, ranked, and evaluated.

"Be All You Can Be," the Army recruiting poster urges young men and women. Many parents share the sentiment. They want their children to be the best they can be. For many parents, their most important project in life is to pursue that goal, and they make sacrifices to see it happen. And why shouldn't parents aim to make their offspring the best they can be?