 Another relevant aspect we did not explore in the present essay, although it should be mentioned at least briefly before closing, consists of debates about “structuralism” outside the philosophy of mathematics. There are two main areas in which one can find such debates (although they have reverberated further). The first is the philosophy of physics, where structuralist positions have played a significant role as well (including one called “structural realism”, which comes in both an “ontic” and an “epistemic” form).  The second consists of several parts of the humanities and social sciences, primarily linguistics and anthropology, but also psychology, sociology, etc. There too, “structuralism” (and “post-structuralism”) has been a major topic, indeed for a relatively long period. In both cases, there are ties to mathematical structuralism, although sometimes these ties are only loose.