This paper explores a methodological lineage among French Spinoza scholars which can be traced back to texts written by Victor Delbos (1862–1916), which later branched out into two diametrically opposed orientations in the work by Martial Gueroult (1891–1976) and Paul Vernière (1916–1997), only to be reunited reflexively in the more recent work by Pierre-François Moreau (1948-). The aim is mostly to offer an original reconstruction of the way in which Delbos’ historical programme was inherited by subsequent Spinoza scholars. While retracing (...) this lineage, my focus will be on a specific historiographical principle first formulated by Delbos. In the conclusion, however, I briefly turn to Spinoza himself, arguing how this reconstituted family of twentieth century French historians of philosophy can be characterized as a form of ‘Historiographical Spinozism’. (shrink)