Over at Princeton University Press, the introduction from Justin E. H. Smith new book:

This book, an essay in the proper Montaignean sense, seeks to answer that most fundamental of philosophical questions: What is philosophy? It does so, however, in an unusual way: by refraining from proclamations about what philosophy, ideally, ought to be, and by asking instead what philosophy has been, what it is that people have been doing under the banner of philosophy in different times and places. In what follows we will survey the history of the various self-conceptions of philosophers in different historical eras and contexts. We will seek to uncover the different “job descriptions” attached to the social role of the philosopher in different times and places. Through historical case studies, autobiographical interjections, and parafictional excursuses, it will be our aim to enrich the current understanding of what the project of philosophy is, or could be, by uncovering and critically examining lost, forgotten, or undervalued conceptions of the project from philosophy’s distinguished past.

This approach could easily seem not just unusual but also misguided, since philosophy is generally conceived as an a priori discipline concerned with conceptual analysis rather than with the collection of particular facts about past practice. As a result of this widespread conception, most commonly, when philosophers set about answering the question as to the nature of their discipline, they end up generating answers that reflect the values and preoccupations of their local philosophical culture. Thus Gilles Deleuze and Félix Guattari answer the question, in their 1991 book What Is Philosophy?, 1 by arguing that it is the activity of conceptual innovation, the generating of new concepts, and thus of new ways of looking at the world. But this is a conception of philosophy that would be utterly unfamiliar to, say, Ludwig Wittgenstein, who suggested that philosophy is the practice of “shewing the fly the way out of the bottle,”2 or, alternatively, that it is “a battle against the bewitchment of our intelligence by means of language,”3 and it would be more unfamiliar still to the natural philosopher of the seventeenth century, who studied meteorological phenomena in order to discern the regularities at work in the world around us, and had no particular interest in devising new concepts for discerning these regularities. Thus when Deleuze and Guattari argue that philosophy is the activity of concept coining, they should really be saying that this is what they would like philosophy to be.

More here.