 Scholz’s most important contributions to the development of logic can be seen in his contributions to the historiography of logic. He stressed the value of the contributions of Gottfried Wilhelm Leibniz (1646–1716) and Bernard Bolzano (1781–1848) for the emergence of modern logic. He applied the method of logical analysis to classical philosophical texts, reconsidering, e. g., Anselm’s proof of the existence of God (Scholz 1950/51), Descartes’s cogito argument (Scholz 1931b), and Kant’s transcendental deduction (Scholz 1943/44). He devoted considerable efforts to the study of Gottlob Frege’s work (cf. Sundholm 2005) and promoted David Hilbert’s metamathematics (Scholz 1942). With his Geschichte der Logik (1931a) Heinrich Scholz was a pioneer in the historiography of modern logic. Scholz restricted his presentation to formal logic or logistics. He reconstructs its development starting with Aristotle’s logic, discussing the Stoic modifications, medieval and early modern variations, arriving at Franz Brentano’s (1838–1917) contributions, whom he called the “only original figure among the German formal logicians [in philosophy] of the 19th century after Bolzano and prior to Husserl” (pp. 46–47). For Scholz, the modern shape of logic starts with Leibniz: “We speak of a sunrise mentioning the great name of Leibniz. With him a new life of Aristotelian logic begins, which finds its most beautiful manifestation in our days in the modern exact logic in the form of logistics” (p. 48). He highlighted Gottlob Frege as “the greatest genius of the new logic in the 19th century” (p. 57). According to Scholz he did more than any other logician for the interpretation of fundamental mathematical concepts with the help of fundamental concepts of logic operating on the basis of exactly defined principles. With this he raised the logical calculus to a level which made the Leibnizian “game with signs” possible.