This article is a review-essay of Frank Degenhardt's Zwischen Machtstaat und Völkerbund. Erich Kaufmann (1880–1972), published in 2008. While this review discusses Degenhardt's achievements, it pays much attention to the different academic contexts this research implies: On the one hand this review-essay contextualizes Degenhartds' own research endeavors, and discusses how Zwischen Machtstaat und Völkerbund is part and parcel of the growing historical analysis in international law both in Germany and elsewhere. On the other hand, it pays attention to Erich Kaufmann's historical context both on a personal and professional level. Furthermore, this review-essay examines Degenhardt's book dedicated to Kaufmann's contributions to international law in light of Kaufmanns' Jewish German identity that was a lifelong Leitmotiv reflected both in his theoretical and practical work.