Modern functionalist approaches to syntax were pioneered in the 1920s by the scholars associated with the Linguistic Circle of Prague and Prague-based functionalism is a dynamic force today. Nevertheless, citations of this work by North American functionalists are few and far between. This paper sets out to explain that state of affairs. It pinpoints the profound theoretical differences between mainstream North American and Czech approaches that have led to partisans of the former losing interest in the latter. The paper argues that, on the other hand, Praguian functional syntax has a great deal in common with more ‘formal’ functionalist approaches and with much work in formal semantics. Not surprisingly, then, recent years have seen increasing productive collaboration between North American and Western European practitioners of these approaches and members of the Prague School.