I have published in French and English on the history of 20th-century philosophy, mainly on Russell and Wittgenstein, but also on other lesser-known figures who do not belong to the analytical tradition, such as William E. Johnson, Giancarlo Rota, and Josiah Royce. I have also published articles on the history of mathematics, particularly geometry, and on the philosophy of mathematics and logic. I particularly enjoy combining the two fields and showing how issues and terminology from philosophy are transformed into logical-mathematical programs—and vice versa.
More recently, I have focused on the reception of early analytic philosophy in areas that have been understudied until now. My recent book Russell global is the first result of this effort. On the one hand, I wish to introduce into the history of analytical philosophy approaches that are now used almost routinely in the history of philosophy of other periods— reception studies, global history, etc. On the other hand, I would like to explore a dimension of universalism associated with the rationalism of early analytical philosophy that has been little explored so far, namely universalism in the cultural sense of the term.