Brian Z Tamanaha (Washington University School of Law) has posted an upcoming article, 'A Vision of Social-Legal Change: Rescuing Ehrlich from "Living Law"' on SSRN. The paper will appear in Law and Social Inquiry. The abstract reads
Prominent American jurists in the early twentieth century immediately recognized the genius of Eugen Ehrlich. Oliver Wendell Holmes told English jurist Frederick Pollock that he considered Ehrlich’s Fundamental Principles “the best book on legal subjects by any living continental jurist.” Roscoe Pound wrote in 1915 to John Chipman Gray, “I think it is the best thing that has been written lately.” Karl Llewellyn lamented that when he found Ehrlich, he was “somewhat crushed in spirit, because [Ehrlich] had seen so much.” Llewellyn identified Ehrlich as an early realist in law.
This is worth a read.