In this new volume Pierre Bourdieu -- one of the foremost social thinkers of our time -- clarifies and elaborates the most fundamental characteristics of his theoretical approach. Bourdieua s theory is both a relational philosophy of science dedicated to revealing the objective relations which shape and underpin social life, and a philosophy of action which takes account of agentsa dispositions as well as the structured situations in which they act. This philosophy of action is condensed in a small number of key concepts -- habitus, field, capital -- and it is defined by the two--way relationship between the objective structures of social fields and the incorporated structures of the habitus. The key concepts and assumptions of Bourdieua s approach are exemplified in this volume through a variety of concrete analyses, from a discussion of the formation of the modern state to an account of the family as a site of social reproduction, from an analysis of the economy of symbolic goods to a reflection on the social conditions of political morality. An excellent and accessible introduction to the work of Bourdieu, Practical Reason will be of great interest to students and scholars in sociology, anthropology, politics and philosophy, and throughout the social sciences and humanities generally.