Over the past four decades the interpretive capacity of lithic analysis in Mesoamerica has changed dramatically. Lithic studies have grown from simple artifact descriptions to a powerful approach for studying and interpreting pre-Hispanic economy. The linchpin for this change was the development of the lithic technology approach (Collins 1975; Crabtree 1968; Flenniken 1981) and its use in asking culturally meaningful questions about the Mesoamerican past (Sheets 1975; Spence 1967). The utility of this approach is as obvious to those who employ it, as it is elusive to those who do not. It involves the recovery, analysis and interpretation of flaked stone residues, that is, the large and small flakes and chips produced when stone tools are manufactured and used. Moreover, it is the study of the mundane to view the mundane, and obtain a window onto the economic patterns of everyday life. The reward from studying thousands of ordinary flaked stone remains comes from the insight it provides for reconstructing and modeling past economic behavior.