The new volume “Die Entstehung des Sozialen Privatrechts in Europa: ein Trialog” (The Emergence of Social Private Law in Europe: A Trialogue) (Studien zur europäischen Rechtsgeschichte, Vol. 327-2) explores a previously under-researched phase in the evolution of legal thought: the collaboration between German, Italian, and French jurists in the reshaping of private law under authoritarian regimes. At its core stands the legal “axis Berlin–Rome”, where, starting in 1936, an ideologically driven departure from the liberal model of private law began to take shape.