Abstract
The roots of model-based phylogeography are usually traced back to the celebrated papers of Wright, Kimura, Cavalli-Sforza and Edwards, and Thompson. Here we discuss a 1972 paper of Sankoff which we believe also belongs among the foundational papers of the field. In it, Sankoff presents a joint model of geographic subdivision and genetics and shows how both geography and phylogeny can be estimated simultaneously from data. We review the paper, and discuss how it connects to contemporary work in the area.