I think what distinguishes philosophers as such is that we study humans as discursive beings—that is, as normative rational creatures, in the sense that what we in the fullest sense do (including believing) is subject to normative assessment as to the goodness of the reasons we have for doing or believing that. (How rational we are in the sense of how successful we are at actually fulfilling our obligations to have such reasons is quite a different matter.) Norms and inferential-justificatory behavior can be studied empirically. But the question of what norms and good inferences are, and of how to understand the kind of creatures we are in virtue of living in such a normative space of reasons seem to me to be of the first importance—not only for philosophers, but for the culture at large.
Continuing the End Times series, Richard Marshall interviews Robert Brandom.