The respondent role Markus Herz performed during Immanuel Kant’s 1770 inaugural dissertation defense at the University of Königsberg marked the beginning of a significant correspondence between the two men. This professional relationship anchored Herz’s intellectual trajectory, bridging his early academic training with his later established practice in medicine and philosophy within the Kingdom of Prussia.
Academic Formation and Early Career
Born in Berlin in 1747, Herz initially pursued a mercantile path before relocating to Königsberg in 1762. He transitioned from commerce to academia, studying under Kant until financial constraints halted his progress. He subsequently served as secretary to a merchant named Ephraim, travelling through the Baltic Provinces. He returned to formal studies at the Martin Luther University Halle-Wittenberg, earning his Doctor of Medicine in 1774.
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Upon settling in Berlin in 1774, Herz secured a position as a physician at the Jewish hospital. By 1777, he commenced a series of public lectures on medicine and philosophy, which attracted students, prominent social figures, and members of the royal family. Health issues stemming from overstudy forced a hiatus in 1782, though a recovery period in Bad Pyrmont allowed him to resume his work by 1785. His career was further recognized in 1791 when he was awarded the title of Professor of Philosophy and appointed Hofrat of Waldeck and Pyrmont.
Intellectual Circles and Social Influence
Following his 1779 marriage to Henriette de Lemos, the Herz residence became a focal point for Berlin’s intellectual community. The couple hosted thinkers and scientists, including Alexander von Humboldt, Friedrich Schleiermacher, and Friedrich Schlegel. Herz maintained close ties with Moses Mendelssohn and engaged in philosophical exchanges with Kant, leaving behind correspondence that remains of historical significance.
Publications and Medical Advocacy
Herz authored several texts across diverse subjects, including 1771’s Betrachtungen aus der Spekulativen Weltweisheit and the 1772 satirical essay Freimüthige Kaffeegespräche Zweier Jüdischer Zuschauerinnen über den Juden Pinkus. His scientific output included the 1786 study Versuch über den Schwindel and 1787’s Grundlage zu den Vorlesungen über die Experimental-Physik. Late in his career, he focused on public health advocacy, notably opposing compulsory vaccination in his 1801 open letter regarding brutal vaccination.
Fast facts
- Born: 1747, Berlin
- Died: 1803, Berlin
- Burial site: Jüdischer Friedhof Berlin-Mitte
- Primary occupations: Physician and philosopher
- Academic institutions: University of Königsberg and Martin Luther University Halle-Wittenberg
- Spouse: Henriette de Lemos
- Citizenship: Kingdom of Prussia
- Professional title: Hofrat of Waldeck and Pyrmont
Questions readers ask
What was Markus Herz's stance on medical practices?
He was a medical doctor who authored several scientific texts, but he notably opposed the practice of compulsory vaccination.
Was Markus Herz solely a philosopher?
No, he was a physician by trade, serving at the Jewish hospital in Berlin, while simultaneously lecturing on philosophy and ethics.
Achievements
- Fields: epistemology, metaphysics and ethics


