Christian Wolff
Born(1679-01-24)24 January 1679
Died9 April 1754(1754-04-09) (aged 75)
EducationUniversity of Jena (1699–1702)[2]
University of Leipzig (Dr. phil. habil., 1703)
Era18th-century philosophy
RegionWestern philosophy
SchoolAge of Enlightenment
InstitutionsLeipzig University
University of Halle
University of Marburg
ThesisPhilosophia practica universalis, methodo mathematica conscripta (On Universal Practical Philosophy, Composed from the Mathematical Method) (1703)
Academic advisorsEhrenfried Walther von Tschirnhaus
Gottfried Leibniz (epistolary correspondent)
Notable studentsMikhail Lomonosov
A. G. Baumgarten
Main interests
Philosophical logic, metaphysics
Notable ideas
Theoretical philosophy has for its parts ontology (also philosophia prima or general metaphysics) and three special metaphysical disciplines (rational psychology, rational cosmology, rational theology)
Coining the philosophical term "idealism"[1]

Christian Wolff (less correctly Wolf,[5] German: [vɔlf]; also known as Wolfius; ennobled as Christian Freiherr von Wolff in 1745; 24 January 1679 – 9 April 1754) was a German philosopher. Wolff is characterized as one of the most eminent German philosophers between Leibniz and Kant. His life work spanned almost every scholarly subject of his time, displayed and unfolded according to his demonstrative-deductive, mathematical method, which some deem the peak of Enlightenment rationality in Germany.[6]

Wolff wrote in German as his primary language of scholarly instruction and research, although he did translate his works into Latin for his transnational European audience. A founding father of, among other fields, economics and public administration as academic disciplines,[citation needed] he concentrated especially in these fields, giving advice on practical matters to people in government, and stressing the professional nature of university education.[citation needed]


Plaque on building in Wrocław (Breslau) where Wolff was born and lived, 1679–99

Wolff was born in Breslau, Silesia (now Wrocław, Poland), into a modest family. He studied mathematics and physics at the University of Jena, soon adding philosophy.

In 1703, he qualified as Privatdozent at Leipzig University,[7] where he lectured until 1706, when he was called as professor of mathematics and natural philosophy to the University of Halle. By this time he had made the acquaintance of Gottfried Leibniz (the two men engaged in an epistolary correspondence[8]), of whose philosophy his own system is a modified version.

At Halle, Wolff at first restricted himself to mathematics, but on the departure of a colleague, he added physics, and soon included all the main philosophical disciplines.[5]

However, the claims Wolff advanced on behalf of philosophical reason appeared impious to his theological colleagues. Halle was the headquarters of Pietism, which, after a long struggle against Lutheran dogmatism, had assumed the characteristics of a new orthodoxy. Wolff's professed ideal was to base theological truths on mathematically certain evidence. Strife with the Pietists broke out openly in 1721, when Wolff, on the occasion of stepping down as pro-rector, delivered an oration "On the Practical Philosophy of the Chinese" (Eng. tr. 1750), in which he praised the purity of the moral precepts of Confucius, pointing to them as an evidence of the power of human reason to reach moral truth by its own efforts.[5]

Delftware plaque with chinoiserie, 17th century

On 12 July 1723, Wolff held a lecture for students and the magistrates at the end of his term as a rector.[9] Wolff compared, based on books by the Flemish missionaries François Noël (1651–1729) and Philippe Couplet (1623–1693), Moses, Christ, and Mohammed with Confucius.[10]

According to Voltaire, Prof. August Hermann Francke had been teaching in an empty classroom but Wolff attracted with his lectures around 1,000 students from all over.[11]

In the follow-up, Wolff was accused by Francke of fatalism and atheism,[12] and ousted in 1723 from his first chair at Halle in one of the most celebrated academic dramas of the 18th century. His successors were Joachim Lange, a pietist, and his son, who had gained the ear of the king Frederick William I. (They claimed to the king if Wolff's determinism were recognized, no soldier who deserted could be punished as he would have acted only as it was necessarily predetermined that he should, which so enraged the king that he immediately deprived Wolff of his office, and ordered Wolff to leave Prussian territory within 48 hours or be hanged.)[5]

The same day, Wolff passed into Saxony, and presently proceeded to Marburg, Hesse-Kassel, to whose university (the University of Marburg) he had received a call even before this crisis, which was now renewed. The Landgrave of Hesse received him with every mark of distinction, and the circumstances of his expulsion drew universal attention to his philosophy. It was everywhere discussed, and over two hundred books and pamphlets appeared for or against it before 1737, not reckoning the systematic treatises of Wolff and his followers.[5]

According to Jonathan I. Israel, "the conflict became one of the most significant cultural confrontations of the 18th century and perhaps the most important of the Enlightenment in Central Europe and the Baltic countries before the French Revolution."[13]

Prussian crown prince Frederick defended Wolff against Joachim Lange and ordered the Berlin minister Jean Deschamps, a former pupil of Wolff, to translate Vernünftige Gedanken von Gott, der Welt und der Seele des Menschen, auch allen Dingen überhaupt into French.[14] Frederick proposed to send a copy of Logique ou réflexions sur les forces de l'entendement humain to Voltaire in his first letter to the philosopher from 8 August 1736. In 1737, Wolff's Metafysica was translated into French by Ulrich Friedrich von Suhm (1691–1740).[15] Voltaire got the impression Frederick had translated the book himself.[citation needed]

In 1738, Frederick William began the hard labour of trying to read Wolff.[16] In 1740, Frederick William died, and one of the first acts of his son and successor, Frederick the Great, was to acquire him for the Prussian Academy.[17] Wolff refused,[18] but accepted on 10 September 1740 an appointment in Halle. [citation needed]

His entry into the town on 6 December 1740 took on the character of a triumphal procession. In 1743, he became chancellor of the university, and in 1745, he received the title of Freiherr (Baron) from the Elector of Bavaria, possibly the first scholar to have been created hereditary Baron of the Holy Roman Empire on the basis of his academic work.[citation needed]

When Wolff died on 9 April 1754, he was a very wealthy man, owing almost entirely to his income from lecture-fees, salaries, and royalties. He was also a member of many academies. His school, the Wolffians, was the first school in the philosophical sense to be associated with a German philosopher. It dominated Germany until the rise of Kantianism.[citation needed]

Wolff was married and had several children.[19]

Philosophical work

Wolffian philosophy has a marked insistence everywhere on a clear and methodic exposition, holding confidence in the power of reason to reduce all subjects to this form. He was distinguished for writing copies in both Latin and German. Through his influence, natural law and philosophy were taught at most German universities, in particular those located in the Protestant principalities. Wolff personally expedited their introduction inside Hesse-Cassel.[20]

The Wolffian system retains the determinism and optimism of Leibniz, but the monadology recedes into the background, the monads falling asunder into souls or conscious beings on the one hand and mere atoms on the other. The doctrine of the pre-established harmony also loses its metaphysical significance (while remaining an important heuristic device), and the principle of sufficient reason is once more discarded in favor of the principle of contradiction which Wolff seeks to make the fundamental principle of philosophy.[5]

Wolff had philosophy divided into a theoretical and a practical part. Logic, sometimes called philosophia rationalis, forms the introduction or propaedeutics to both.[5]

Theoretical philosophy had for its parts ontology or philosophia prima as a general metaphysics,[21] which arises as a preliminary to the distinction of the three special metaphysics[22] on the soul, world and God:[23][24] rational psychology,[25][26] rational cosmology,[27] and rational theology.[28] The three disciplines are called empirical and rational because they are independent of revelation. This scheme, which is the counterpart of religious tripartition in creature, creation, and Creator, is best known to philosophical students by Kant's treatment of it in the Critique of Pure Reason.[5]

In the "Preface" of the 2nd edition of Kant's book, Wolff is defined as "the greatest of all dogmatic philosophers."[29] Wolff was read by Søren Kierkegaard's father, Michael Pedersen. Kierkegaard himself was influenced by both Wolff and Kant to the point of resuming the tripartite structure and philosophical content to formulate his own three Stages on Life's Way.[30]

Wolff saw ontology as a deductive science, knowable a priori and based on two fundamental principles: the principle of non-contradiction ("it cannot happen that the same thing is and is not") and the principle of sufficient reason ("nothing exists without a sufficient reason for why it exists rather than does not exist").[31][32] Beings are defined by their determinations or predicates, which can't involve a contradiction. Determinates come in 3 types: essentialia, attributes, and modes.[31] Essentialia define the nature of a being and are therefore necessary properties of this being. Attributes are determinations that follow from essentialia and are equally necessary, in contrast to modes, which are merely contingent. Wolff conceives existence as just one determination among others, which a being may lack.[33] Ontology is interested in being at large, not just in actual being. But all beings, whether actually existing or not, have a sufficient reason.[34] The sufficient reason for things without actual existence consists in all the determinations that make up the essential nature of this thing. Wolff refers to this as a "reason of being" and contrasts it with a "reason of becoming", which explains why some things have actual existence.[33]

Practical philosophy is subdivided into ethics, economics and politics. Wolff's moral principle is the realization of human perfection[5]—seen realistically as the kind of perfection the human person actually can achieve in the world in which we live. It is perhaps the combination of Enlightenment optimism and worldly realism that made Wolff so successful and popular as a teacher of future statesmen and business leaders.[35]


Elementa matheseos universae, 1746

Wolff's most important works are as follows:[5]

Wolff's complete writings have been published since 1962 in an annotated reprint collection:

This includes a volume that unites the three most important older biographies of Wolff.

An excellent modern edition of the famous Halle speech on Chinese philosophy is:

See also



  1. ^ Guyer, Paul; Horstmann, Rolf-Peter (30 August 2015). "Idealism". In Zalta, Edward N. (ed.). Stanford Encyclopedia of Philosophy. Stanford, California: Metaphysics Research Lab, Stanford University.
  2. ^ a b Robert Theis, Alexander Aichele (eds.), Handbuch Christian Wolff, Springer-Verlag, 2017, p. 442.
  3. ^ a b c d Brady Bowman, Hegel and the Metaphysics of Absolute Negativity, Cambridge University Press, 2013, p. 66.
  4. ^ David E. Cartwright, Schopenhauer: A Biography, Cambridge University Press, 2010, p. 192 n. 41.
  5. ^ a b c d e f g h i j  One or more of the preceding sentences incorporates text from a publication now in the public domainPringle-Pattison, Andrew Seth; Anonymous (1911). "Wolff, Christian". In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 28 (11th ed.). Cambridge University Press. p. 774.
  6. ^ Corr, Charles A. (1975). "Christian Wolff and Leibniz". Journal of the History of Ideas. 36 (2): 241–262. doi:10.2307/2708926. ISSN 0022-5037. JSTOR 2708926.
  7. ^ His habilitation thesis title was Philosophia practica universalis, methodo mathematica conscripta (On Universal Practical Philosophy, Composed from the Mathematical Method).
  8. ^ Leibniz to Christian Wolff (selections) - Leibniz Translations.
  9. ^ Wolff, C. (1985). Michael Albrecht (ed.). Oratio de Sinarum philosophia practica/Rede über die praktische Philosophie der Chinesen. Philosophische Bibliothek (in German). Hamburg, Germany: Felix Meiner Verlag. p. XXXIX.
  10. ^ Lang, Donald F. (1953). "The Sinophilism of Christian Wolf (1679–1754)". Journal of the History of Ideas. 14 (4). University of Pennsylvania Press: 561–574. doi:10.2307/2707702. JSTOR 2707702.
  11. ^ "Auditorium Maximum der Universität Halle" (in German). Rathausseite. Archived from the original on 11 February 2013. Retrieved 1 January 2012.
  12. ^ Uhalley, Stephen; Xiaoxin Wu (2001). China and Christianity. Burdened Past, Hopeful Future. San Francisco: University of San Francisco Ricci Institute for Chinese-Western Cultural History. p. 160. ISBN 0-76560661-5.
  13. ^ Israel, Jonathan I. (2002). "29". Radical Enlightenment: Philosophy and the Making of Modernity. Oxford University Press. ISBN 0-19925456-7.
  14. ^ Vidal, Fernando (December 2011). The Sciences of the Soul. The Early Modern Origins of Psychology. University of Chicago Press. p. 92. ISBN 9780226855882.
  15. ^ Spalding, Paul S.; Schmidt, Johann Lorenz (1998). Seize the Book, Jail the Author. Johann Lorenz Schmidt and Censorship in Eighteenth-century Germany. West Lafayette, Indiana: Purdue University Press. p. 128. ISBN 1-55753116-1.
  16. ^ MacDonogh, G. (1999) Frederick the Great, p. 129.
  17. ^ MacDonogh, G. (1999) Frederick the Great, p. 134.
  18. ^ Fellmann, Emil A. (2007). Leonhard Euler. Springer Science+Business Media. p. 82. ISBN 978-3-76437539-3.
  19. ^ Wolff, Christian (1841). Eigene Lebensbeschreibung. Leipzig.
  20. ^ Ingrao, 1982, p. 955
  21. ^ Hettche, Matt (11 November 2014). "Christian Wolff. 8.1 Ontology (or Metaphysics Proper)". SEP. Retrieved 24 March 2018.
  22. ^ Hettche, Matt (11 November 2014). "Christian Wolff. 8. Theoretical Philosophy". SEP. Retrieved 24 March 2018.
  23. ^ Mattey, George J. (2012). "UC Davis Philosophy 175 (Mattey) Lecture Notes: Rational Psychology". University of California, Davis, Department of Philosophy. Archived from the original on 8 December 2018. Retrieved 11 March 2018.
  24. ^ van Inwagen, Peter (31 October 2014). "1. The Word 'Metaphysics' and the Concept of Metaphysics". SEP. Retrieved 11 March 2018.
  25. ^ Hettche, Matt (11 November 2014). "Christian Wolff. 8.3 Psychology (Empirical and Rational)". SEP. Retrieved 24 March 2018.
  26. ^ Duignan, Brian (20 April 2009). "Rational psychology". Encyclopædia Britannica. Retrieved 12 March 2018.
  27. ^ Hettche, Matt (11 November 2014). "Christian Wolff. 8.2 Cosmology". SEP. Retrieved 24 March 2018.
  28. ^ Hettche, Matt (11 November 2014). "Christian Wolff. 8.4 Natural Theology". SEP. Retrieved 24 March 2018.
  29. ^ Hettche, Matt (11 November 2014). "Christian Wolff". SEP. Retrieved 24 March 2018.
  30. ^ Klempe, Sven Hroar (2017) [2014]. Kierkegaard and the Rise of Modern Psychology. Abingdon-on-Thames: Routledge. p. 74. ISBN 978-1-35151022-6.
  31. ^ a b Craig, Edward (1996). "Wolff, Christian". Routledge Encyclopedia of Philosophy. Routledge.
  32. ^ Sandkühler, Hans Jörg (2010). "Ontologie". Enzyklopädie Philosophie. Meiner. Archived from the original on 11 March 2021. Retrieved 16 December 2020.
  33. ^ a b Hettche, Matt; Dyck, Corey (2019). "Christian Wolff". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 16 December 2020.
  34. ^ Borchert, Donald M. (2006). "Ontology, History of". Macmillan Encyclopedia of Philosophy, 2nd Edition. Macmillan.
  35. ^ Hettche, Matt (11 November 2014). "Christian Wolff. 9. Practical Philosophy". SEP. Retrieved 24 March 2018.
  36. ^ Available online on Göttinger Digitalisierungszentrum.