 But philosophers far beyond the Marburg School were influenced by Cohen’s insistence that the philosophical reconstruction of scientific theories is the principal method of the theory of knowledge, and that its principal topic is mathematically-precise natural science. Logical positivist philosophy of science took up aspects of Cohen’s project, including its central concern with mathematics and physics. Like Cohen, positivists also thought philosophy should accept existing bodies of science as a starting point, and should seek to reconstruct that science’s theories and methods, even though they thought modern logic was the proper tool for carrying out their reconstructions. (Cf. Richardson 2006 and Ferrari 2018 for discussions of Cohen’s philosophy in relation to logical empiricism.) Recent scholarship on logical positivism, and especially on Rudolf Carnap, has emphasized its intellectual debts to Marburg School neo-Kantianism. (Cf. Friedman 1999 and 2000; Richardson 1998 and especially 2006.) Conversely, a French tradition of philosophy of science emphasized a different aspect of Cohen’s project. The neo-Kantian Emile Meyerson, and his intellectual heirs, Alexandre Koyré and ultimately Thomas Kuhn, emphasized a more deeply historical reconstruction of scientific theories and methods. Finally, more recent philosophy of science has seen a turn back to views even more explicitly inspired by Marburg School doctrines: most prominently, Michael Friedman has defended the view that in reconstructing scientific theories, philosophy should seek to articulate the “constitutively a priori” principles in those theories—that is, principles that are constitutive of the possibility of experience in precisely Cohen’s sense (Friedman 2001; cf. Giovanelli 2018). More generally, although twentieth-century history and philosophy of science did not always take seriously Cohen’s substantive doctrines, it was nevertheless affected profoundly by his vision of philosophy as the reconstruction of historical developments in mathematically-precise natural science.