Jakob Friedrich Fries

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Fries, Jakob Friedrich


Born Aug. 23, 1773, in Barby, Saxony; died Aug. 10, 1843, in Jena. German idealist philosopher.

Fries became a professor in Jena in 1805, later taking a professorship in Heidelberg and returning to Jena in 1816. He was deprived of his professorship in Jena from 1818 to 1824 for having participated in the student movement. Fries interpreted the philosophy of I. Kant in the spirit of psychologism and held that the a priori elements of cognition could be established empirically. He regarded psychological “anthropology” as the basis of philosophy, and he viewed the world as an organism constructed according to the laws of mechanics and mathematics. Fries influenced L. Nelson, who founded the Neo-Friesian school.


Wissen, Glauben und Ahnung, 2nd ed. Berlin, 1931.
Neue oder anthropologische Kritik der Vernunft, 2nd ed., vols. 1–3. Berlin, 1935.
Handbuch der praktischen Philosophie, vols. 1–2. Heidelberg, 1817–32.
Handbuch der psychischen Anthropologie, 2nd ed., vols. 1–2. Jena, 1837–39.


Henke, E. L. T. Jakob Friedrich Fries. Leipzig, 1867.
Bloching, K. H. Jakob Friedrich Fries: Philosophie als Theorie der Subjektivität. [Münster] 1969.
References in periodicals archive ?
Jakob Friedrich Fries, one of the most prominent Kantians during the first decades of the nineteenth century, argued that in order to avoid the Regress Puzzle, Kant's transcendental methodology had to be reconstructed on empirical-psychological premises.
According to Jena professor Jakob Friedrich Fries, the duel of honor was "something in between war, in which all violence and trickery are allowed, and peace, in which only the law prevails.
Facts, Opinions, Causes"), Gerald Hubmann, "Sittlichkeit und Recht: Die judische Emanzipationsfrage bei Jakob Friedrich Fries und anderen Staatsdenkern des Deutschen Idealismus" ("Morality and Law: The Issue of Jewish Emancipation in J.
Jakob Friedrich Fries, Johann Friedrich Herbart, and Friedrich Eduard Beneke all sought to reestablish natural science as the pinnacle of human reason, while adapting its empirical methods into a genuinely philosophical reflection on knowledge.