In his challenge to the validity and utility of my argument in “Ethnicity and Practice” (CSSH 29:1, 24–55), Yelvington raises a number of issues. He notes, for instance, that I did not, in that article, offer a specific definition of ethnicity, although I did consistently refer to ethnicity as descent symbolism and as fictive kinship. Indeed, I believe ethnicity is, at base, a claim to common identity based on putative shared descent. Wherever we find an “ethnic” category or group of people, we will also find a myth that they all originated in some primordial person, place, or event. Membership in the category or group is validated by pointing to some set of attributes, usually overt culture traits, the members believe they share in common. Given Yelvington's concluding paragraph, it appears we generally agree on what ethnicity is, if not on how to explain it.