Abstract
We argue for a conception of ‘philosophy of biology before biology’ which is neither internalist study of biological doctrines, nor a reconstruction of the role philosophical concepts might have played in the constitution of biology as science, but rather a kind of interplay between metaphysical and empirical issues. This should have an impact both on our present understanding of philosophy of biology, given that it is necessarily conditioned by a very specific history and historiography, and on our understanding of how biology as a science of life became unified.