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person1743-1819

Friedrich Heinrich Jacobi

Disciplines:
philosophy
theology
epistemology

Summary

German philosopher who triggered the Pantheismusstreit (Pantheism Controversy) by claiming Lessing was a Spinozist and arguing that all consistent rational philosophy leads to Spinozism (fatalism/atheism) — faith (Glaube) must take priority over reason.

Core Contribution

All consistent rationalism leads to Spinozism; Spinozism leads to fatalism and the denial of personal God and free will; therefore one must make a salto mortale (leap of faith) to personal theism against philosophical reason. The concept of the Salto Mortale influenced Kierkegaard's leap of faith.

Key Spikes & Highlights

  • The Pantheismusstreit he triggered forced Kant to clarify his position on God and morality, Schiller to take sides, and Mendelssohn to write his last book — one of the most consequential philosophical controversies of the German Enlightenment.
  • Argued that immediate knowledge (unmittelbare Erkenntnis) — non-inferential, direct, intuitive — is the foundation of all mediated rational knowledge; this anticipates reliabilist epistemology.

Notable Works & Achievements

On the Doctrine of Spinoza

David Hume on Faith

On Divine Things

Historical Influences

Baruch Spinoza David Hume

Intellectual Lineage

German Rationalism Lutheran Pietism

Contemporaries & Peers

Immanuel Kant Moses Mendelssohn Friedrich Schiller

Minds Influenced

Johann Gottlieb Fichte F. W. J. SchellingSøren Kierkegaard

Intellectual Posterity

Philosophy of FaithKierkegaardian LeapPantheism Controversy

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