In modern society, poverty has been defined not only by quantitative measures of well-being but as a morally distinct category. In turn, the moral status of poverty has frequently been associated with primordial characteristics of race, ethnicity, national origin, or religion. In these moral and ascriptive respects, the social structure of poverty has been related systematically to the thrust of civil legal assistance on behalf of the poor.Cyclically over the past century in the industrialized West, the poor have been organized into a social status with castelike features. In alternating historical periods, not only have the poor been culturally differentiated as an inherently different status group, their qualitative distinction has been institutionally constructed by practices of segregation legally sanctioned by the state. By noting the historically fluctuating phases in the construction of a modern caste of the poor, we may better understand the sociological significance of providing counseling to the poor on their civil legal problems. Modern law quite generally and civil legal assistance to the poor in some narrow but notable ways have significantly promoted the structuring of poverty into caste forms. And the caste status of poverty has shaped the role of lawyers for the poor in several important respects.