She then gives an insightful historical account starting from nineteenth-century giants including Theodor Schwann and Rudolf Virchow.

During his cardiology training, Libby studied immunology, and he became fascinated with the work of Rudolf Virchow, a nineteenth-century German pathologist.

Here, as also in regard to “Darwinism,” which was advanced about the same time, the typical advocate of “caution” was Rudolf Virchow.