Education forms a unique dimension of social status, with qualities that make it especially important to health. It influences health in ways that are varied, present at all stages of adult life, cumulative, self-amplifying, and uniformly positive. Educational attainment marks social status at the beginning of adulthood, functioning as the main bridge between the status of one generation and the next, and also as the main avenue of upward mobility. It precedes the other acquired social statuses and substantially influences them, including occupational status, earnings, and personal and...

A core interest of social science is the study of stratification--inequalities in income, power, and prestige. Few persons would care about such inequalities if the poor, powerless, and despised were as happy and fulfilled as the wealthy, powerful, and admired. Social research often springs from humanistic empathy and concern as much as from scholarly and scientific curiosity. An economist might observe that black Americans are disproportionately poor, and investigate racial differences in education, employment, and occupation that account for disproportionate poverty. A table comparing...