Cabanis
Caesalpin
Caird, Edward
Caird, John
Cairns
Calker, F.V. 
Camerer
Campanella, Thomas system of
Campe
Cantoni
Cantor, G.
Caporali, E.
Cardanus, Hieronymus
Carlyle, Thomas
Carneri
Caro, E.
Carpenter, W.B. 
Carriere, M.
Cartesians, the
 Locke’s relation to
 Leibnitz’s relation to
Carus, F.A. 
Carus, K.G. 
Carus, P.
Caspari, O.
Categories, the, Kant on
 Hegel’s doctrine of
Caterus
Causation
 Spinoza’s view of
 Locke on
 Hume’s skeptical analysis of
 Kant on
 Schopenhauer on
 Lotze on
 Hartmann on See also Sufficient Reason, Teleology
Cesca, Giovanni
Chalybaeus
Chandler, Samuel
Channing, W.E. 
Character, the Intelligible in Kant in Schelling in Schopenhauer
Charron, Pierre
Christ, P.
Chubb, Thomas
Cieszkowski, A. von
Clarke, Samuel ethics of
Class, G.
Classen, A.
Clauberg
Cogito ergo sum the Cartesian
Cohen, H.
Colecchi, A.
Coleridge, S.T. 
Collard, Royer
Collier, Arthur
Collins, Anthony
Collins, F.H. 
Collins, W.L. 
Combachius
Comenius
Commer, E.
Common Sense, Scottish doctrine of
Comte, Auguste
Condillac doctrine of
Condorcet
Conn, H.W. 
Conybeare, J.
Copernicus, N.
Cordemoy
Cosmological Argument, the in Locke in Rousseau in Leibnitz in Kant
Cotes, Roger
Cousin, Victor
Cremonini
Crescas, Chasdai
Creuz, K. von
Critique of Reason, the meaning of the neo-Kantians on its central position in modern thought
Crousaz
Crusius, C.A. 
Cudworth, Ralph ethics of
Cumberland, Richard
Czolbe, H.

D’Alembert
Damiron
Danzel
Darjes
Darwin, Charles
Darwin, Erasmus
Daub, K.
Da Vinci, Leonardo
Deism naturalism of in Herbert in English thinkers of XVIII. century in Hume in Rousseau of Reimarus in Lessing
 Kant’s relation to See also Faith, Faith and Reason, Religion, Theology
Delboeuf
Delff, H.
De Morgan, A.

Denifle
Des Bosses
Descartes, Rene system of and occasionalism and Spinoza and Locke and Leibnitz See also Spinoza
Desdouits
Dessoir, M.
Deter
Determinism in Hobbes in Spinoza of the early associationalists of Hume in Leibnitz of Schleiermacher of Herbart of Schopenhauer of J.S.  Mill of Jonathan Edwards See also Character, the Intelligible; Freedom of the Will
Deussen, P.
Deutinger, M.
De Wette
Dewey, J.
Diderot, Denis
Diels, H.
Dieterich, K.
Digby, Everard
Dillman
Dilthey, W. doctrine of,
Dippe, A.
Doering, A.
Dorner, A.
Doubt the Cartesian in Bayle
 Rousseau’s reverential
Drobisch, M.W. 
Droz
Druskowitz, Helene
Du Bois-Reymond, E
Duehring, E.
Dumont, E.
Duncan, G.M. 
Durdik