This document discusses the theory of the material self, which suggests that peoples' identities and sense of self are reflected in the material possessions they acquire and display. It covers three key points: 1) how material possessions can fulfill instrumental, social, and symbolic functions as extensions of the self, 2) how consumers consider their needs versus wants and social/financial factors when acquiring goods, and 3) the role of consumer culture in shaping peoples' sense of identity through branding and consumption.