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Topics

Introduction
Problems
Freedom
Knowledge
Mind
Life
Chance
Quantum
Entanglement
Scandals

Philosophers

Mortimer Adler
Rogers Albritton
Alexander of Aphrodisias
Samuel Alexander
William Alston
Anaximander
G.E.M.Anscombe
Anselm
Louise Antony
Thomas Aquinas
Aristotle
David Armstrong
Harald Atmanspacher
Robert Audi
Augustine
J.L.Austin
A.J.Ayer
Alexander Bain
Mark Balaguer
Jeffrey Barrett
William Barrett
William Belsham
Henri Bergson
George Berkeley
Isaiah Berlin
Richard J. Bernstein
Bernard Berofsky
Robert Bishop
Max Black
Susan Blackmore
Susanne Bobzien
Emil du Bois-Reymond
Hilary Bok
Laurence BonJour
George Boole
Émile Boutroux
Daniel Boyd
F.H.Bradley
C.D.Broad
Michael Burke
Jeremy Butterfield
Lawrence Cahoone
C.A.Campbell
Joseph Keim Campbell
Rudolf Carnap
Carneades
Nancy Cartwright
Gregg Caruso
Ernst Cassirer
David Chalmers
Roderick Chisholm
Chrysippus
Cicero
Tom Clark
Randolph Clarke
Samuel Clarke
Anthony Collins
August Compte
Antonella Corradini
Diodorus Cronus
Jonathan Dancy
Donald Davidson
Mario De Caro
Democritus
William Dembski
Brendan Dempsey
Daniel Dennett
Jacques Derrida
René Descartes
Richard Double
Fred Dretske
Curt Ducasse
John Earman
Laura Waddell Ekstrom
Epictetus
Epicurus
Austin Farrer
Herbert Feigl
Arthur Fine
John Martin Fischer
Frederic Fitch
Owen Flanagan
Luciano Floridi
Philippa Foot
Alfred Fouilleé
Harry Frankfurt
Richard L. Franklin
Bas van Fraassen
Michael Frede
Gottlob Frege
Peter Geach
Edmund Gettier
Carl Ginet
Alvin Goldman
Gorgias
Nicholas St. John Green
Niels Henrik Gregersen
H.Paul Grice
Ian Hacking
Ishtiyaque Haji
Stuart Hampshire
W.F.R.Hardie
Sam Harris
William Hasker
R.M.Hare
Georg W.F. Hegel
Martin Heidegger
Heraclitus
R.E.Hobart
Thomas Hobbes
David Hodgson
Shadsworth Hodgson
Baron d'Holbach
Ted Honderich
Pamela Huby
David Hume
Ferenc Huoranszki
Frank Jackson
William James
Lord Kames
Robert Kane
Immanuel Kant
Tomis Kapitan
Walter Kaufmann
Jaegwon Kim
William King
Hilary Kornblith
Christine Korsgaard
Saul Kripke
Thomas Kuhn
Andrea Lavazza
James Ladyman
Christoph Lehner
Keith Lehrer
Gottfried Leibniz
Jules Lequyer
Leucippus
Michael Levin
Joseph Levine
George Henry Lewes
C.I.Lewis
David Lewis
Peter Lipton
C. Lloyd Morgan
John Locke
Michael Lockwood
Arthur O. Lovejoy
E. Jonathan Lowe
John R. Lucas
Lucretius
Alasdair MacIntyre
Ruth Barcan Marcus
Tim Maudlin
James Martineau
Nicholas Maxwell
Storrs McCall
Hugh McCann
Colin McGinn
Michael McKenna
Brian McLaughlin
John McTaggart
Paul E. Meehl
Uwe Meixner
Alfred Mele
Trenton Merricks
John Stuart Mill
Dickinson Miller
G.E.Moore
Ernest Nagel
Thomas Nagel
Otto Neurath
Friedrich Nietzsche
John Norton
P.H.Nowell-Smith
Robert Nozick
William of Ockham
Timothy O'Connor
Parmenides
David F. Pears
Charles Sanders Peirce
Derk Pereboom
Gualtiero Piccinini
Steven Pinker
U.T.Place
Plato
Karl Popper
Porphyry
Huw Price
H.A.Prichard
Protagoras
Hilary Putnam
Willard van Orman Quine
Frank Ramsey
Ayn Rand
Michael Rea
Thomas Reid
Charles Renouvier
Nicholas Rescher
C.W.Rietdijk
Richard Rorty
Josiah Royce
Bertrand Russell
Paul Russell
Gilbert Ryle
Jean-Paul Sartre
Kenneth Sayre
T.M.Scanlon
Moritz Schlick
John Duns Scotus
Albert Schweitzer
Arthur Schopenhauer
John Searle
Wilfrid Sellars
David Shiang
Alan Sidelle
Ted Sider
Henry Sidgwick
Walter Sinnott-Armstrong
Peter Slezak
J.J.C.Smart
Saul Smilansky
Michael Smith
Baruch Spinoza
L. Susan Stebbing
Isabelle Stengers
George F. Stout
Galen Strawson
Peter Strawson
Eleonore Stump
Francisco Suárez
Richard Taylor
Kevin Timpe
Mark Twain
Peter Unger
Peter van Inwagen
Manuel Vargas
John Venn
Kadri Vihvelin
Voltaire
G.H. von Wright
David Foster Wallace
R. Jay Wallace
W.G.Ward
Ted Warfield
Roy Weatherford
C.F. von Weizsäcker
William Whewell
Alfred North Whitehead
David Widerker
David Wiggins
Bernard Williams
Timothy Williamson
Ludwig Wittgenstein
Susan Wolf
Xenophon

Scientists

David Albert
Philip W. Anderson
Michael Arbib
Bobby Azarian
Walter Baade
Bernard Baars
Jeffrey Bada
Leslie Ballentine
Marcello Barbieri
Jacob Barandes
Julian Barbour
Horace Barlow
Gregory Bateson
Jakob Bekenstein
John S. Bell
Mara Beller
Charles Bennett
Ludwig von Bertalanffy
Susan Blackmore
Margaret Boden
David Bohm
Niels Bohr
Ludwig Boltzmann
John Tyler Bonner
Emile Borel
Max Born
Satyendra Nath Bose
Walther Bothe
Jean Bricmont
Hans Briegel
Leon Brillouin
Daniel Brooks
Stephen Brush
Henry Thomas Buckle
S. H. Burbury
Melvin Calvin
William Calvin
Donald Campbell
John O. Campbell
Sadi Carnot
Sean B. Carroll
Anthony Cashmore
Eric Chaisson
Gregory Chaitin
Jean-Pierre Changeux
Rudolf Clausius
Arthur Holly Compton
John Conway
Simon Conway-Morris
Peter Corning
George Cowan
Jerry Coyne
John Cramer
Francis Crick
E. P. Culverwell
Antonio Damasio
Olivier Darrigol
Charles Darwin
Paul Davies
Richard Dawkins
Terrence Deacon
Lüder Deecke
Richard Dedekind
Louis de Broglie
Stanislas Dehaene
Max Delbrück
Abraham de Moivre
David Depew
Bernard d'Espagnat
Paul Dirac
Theodosius Dobzhansky
Hans Driesch
John Dupré
John Eccles
Arthur Stanley Eddington
Gerald Edelman
Paul Ehrenfest
Manfred Eigen
Albert Einstein
George F. R. Ellis
Walter Elsasser
Hugh Everett, III
Franz Exner
Richard Feynman
R. A. Fisher
David Foster
Joseph Fourier
George Fox
Philipp Frank
Steven Frautschi
Edward Fredkin
Augustin-Jean Fresnel
Karl Friston
Benjamin Gal-Or
Howard Gardner
Lila Gatlin
Michael Gazzaniga
Nicholas Georgescu-Roegen
GianCarlo Ghirardi
J. Willard Gibbs
James J. Gibson
Nicolas Gisin
Paul Glimcher
Thomas Gold
A. O. Gomes
Brian Goodwin
Julian Gough
Joshua Greene
Dirk ter Haar
Jacques Hadamard
Mark Hadley
Ernst Haeckel
Patrick Haggard
J. B. S. Haldane
Stuart Hameroff
Augustin Hamon
Sam Harris
Ralph Hartley
Hyman Hartman
Jeff Hawkins
John-Dylan Haynes
Donald Hebb
Martin Heisenberg
Werner Heisenberg
Hermann von Helmholtz
Grete Hermann
John Herschel
Francis Heylighen
Basil Hiley
Art Hobson
Jesper Hoffmeyer
John Holland
Don Howard
John H. Jackson
Ray Jackendoff
Roman Jakobson
E. T. Jaynes
William Stanley Jevons
Pascual Jordan
Eric Kandel
Ruth E. Kastner
Stuart Kauffman
Martin J. Klein
William R. Klemm
Christof Koch
Simon Kochen
Hans Kornhuber
Stephen Kosslyn
Daniel Koshland
Ladislav Kovàč
Leopold Kronecker
Bernd-Olaf Küppers
Rolf Landauer
Alfred Landé
Pierre-Simon Laplace
Karl Lashley
David Layzer
Joseph LeDoux
Gerald Lettvin
Michael Levin
Gilbert Lewis
Benjamin Libet
David Lindley
Seth Lloyd
Werner Loewenstein
Hendrik Lorentz
Josef Loschmidt
Alfred Lotka
Ernst Mach
Donald MacKay
Henry Margenau
Lynn Margulis
Owen Maroney
David Marr
Humberto Maturana
James Clerk Maxwell
John Maynard Smith
Ernst Mayr
John McCarthy
Barbara McClintock
Warren McCulloch
N. David Mermin
George Miller
Stanley Miller
Ulrich Mohrhoff
Jacques Monod
Vernon Mountcastle
Gerd B. Müller
Emmy Noether
Denis Noble
Donald Norman
Travis Norsen
Howard T. Odum
Alexander Oparin
Abraham Pais
Howard Pattee
Wolfgang Pauli
Massimo Pauri
Wilder Penfield
Roger Penrose
Massimo Pigliucci
Steven Pinker
Colin Pittendrigh
Walter Pitts
Max Planck
Susan Pockett
Henri Poincaré
Michael Polanyi
Daniel Pollen
Ilya Prigogine
Hans Primas
Giulio Prisco
Zenon Pylyshyn
Henry Quastler
Adolphe Quételet
Pasco Rakic
Nicolas Rashevsky
Lord Rayleigh
Frederick Reif
Jürgen Renn
Giacomo Rizzolati
A.A. Roback
Emil Roduner
Juan Roederer
Robert Rosen
Frank Rosenblatt
Jerome Rothstein
David Ruelle
David Rumelhart
Michael Ruse
Stanley Salthe
Robert Sapolsky
Tilman Sauer
Ferdinand de Saussure
Jürgen Schmidhuber
Erwin Schrödinger
Aaron Schurger
Sebastian Seung
Thomas Sebeok
Franco Selleri
Claude Shannon
James A. Shapiro
Charles Sherrington
Abner Shimony
Herbert Simon
Dean Keith Simonton
Edmund Sinnott
B. F. Skinner
Lee Smolin
Ray Solomonoff
Herbert Spencer
Roger Sperry
John Stachel
Kenneth Stanley
Henry Stapp
Ian Stewart
Tom Stonier
Antoine Suarez
Leonard Susskind
Leo Szilard
Max Tegmark
Teilhard de Chardin
Libb Thims
William Thomson (Kelvin)
Richard Tolman
Giulio Tononi
Peter Tse
Alan Turing
Robert Ulanowicz
C. S. Unnikrishnan
Nico van Kampen
Francisco Varela
Vlatko Vedral
Vladimir Vernadsky
Clément Vidal
Mikhail Volkenstein
Heinz von Foerster
Richard von Mises
John von Neumann
Jakob von Uexküll
C. H. Waddington
Sara Imari Walker
James D. Watson
John B. Watson
Daniel Wegner
Steven Weinberg
August Weismann
Paul A. Weiss
Herman Weyl
John Wheeler
Jeffrey Wicken
Wilhelm Wien
Norbert Wiener
Eugene Wigner
E. O. Wiley
E. O. Wilson
Günther Witzany
Carl Woese
Stephen Wolfram
H. Dieter Zeh
Semir Zeki
Ernst Zermelo
Wojciech Zurek
Konrad Zuse
Fritz Zwicky

Presentations

ABCD Harvard (ppt) Bhaktivedanta Aug 2026
Biosemiotics
Free Will
Mental Causation
James Symposium
CCS25 Talk
Evo Devo September 12
Evo Devo October 2
Evo Devo Davies Nov12

 
Philosophers
We include those philosophers whose work made the greatest contribution to our three major problems, freedom of the will, values, and knowledge.

-400 | 1200 | 1600 | 1800 | 1900 | 1950 | 2000
Democritus (ca. 460)
"By convention hot, by convention cold, but in reality atoms and void.” (Fr. 117, Diogenes Laertius IX, 72)
Aristotle (384-322)
Chance is real. Accidents have indefinite causes.
Plato (428-348)
Epicurus (341-270)
Determinism is escaped by the random swerve of atoms in the void.
Cicero (106-43)
"If there is free will, all things do not happen according to fate; if all things do not happen according to fate, there is not a certain order of causes; and if there is not a certain order of causes, neither is there a certain order of things foreknown by God."
Porphyry (232-305)
Do the universal categories exist?
Augustine (354-430)
"God must needs have given free will to man. God's foreknowledge is not opposed to our free choice." (On Free Choice of the Will, Book Two, I, 7, Book Three, IV, 38)
Pelagius (ca. 354-440)
Man is free. There is no predestination.
Aquinas (1225-1274)
For God, time is an eternal moment (totem simul). Free will is compatible with God causing all things.
Scotus (1266-1308)
God, like man, has free will. To know his works, they must be studied. They cannot be deduced by Reason alone.
Ockham (1288-1348)
God may not have foreknowledge of future contingent events, which depend on human choices.
Luther (1483-1546)
"Unless you attribute all or everything to free will, as the Pelagians do, the contradictions of Scripture still remain...Therefore, we must go to extremes, deny free will altogether and ascribe everything to God." (Bondage of the Will, AW 755)
Arminius (1560-1609)
The will is self-determining, to the exclusion of any prior cause outside the will. (Jonathan Edwards, Freedom of the Will, p.18)
Descartes (1596-1650)
"Cogito, ergo sum." "We are so conscious of the freedom and indeterminacy which exist in us, that there is nothing we comprehend more clearly and perfectly"
Hobbes (1588-1679)
"That which I say necessitates and determinates every action is the sum of all those things which, being now existent, conduce and concur to the production of the action hereafter, whereof if any one one thing were wanting, the effect could not be produced. This concourse of causes, whereof every one is determined to be such as it is by a like concourse of former causes, may well be called the decree of God." (Of Liberty and Necessity, sect 11)
Spinoza (1632-1677)
"[God is] the free cause of all things; that all things are in Him, and so depend on Him that without Him they can neither be nor be conceived; and finally that all things have been predetermined by Him... In the mind there is no absolute or free will, but the mind is determined to this or that volition by a cause, which is also determined by another cause, and this again by another, and so on ad infinitum." (Spinoza, Ethic, Appendix and Prop XLVIII)
Leibniz (1646-1716)
The Principle of Sufficient Reason says that every event has a reason or cause in the prior state of the world.
Voltaire (1694-1778)
Hume (1711-1776)
You cannot get "ought" from "is."
Kant (1724-1804)
Kant reacted to the Enlightenment, to the Age of Reason, and to Newtonian physics (which he understood better than any other philosopher), by accepting determinism as a fact in the physical world, which he called the phenomenal world. He then put limits on what we can know by pure speculative Reason, in order to make room for belief in a timeless noumenal world that includes God, Freedom, and Immortality.

Kant's noumenal world is a variation on Plato's Idea of Soul, Descartes' Mind, and the Scholastics' idea of a world in which all times are present to the eye of God. His idea of free will is a most esoteric form of compatibilism. Our decisions are made in our souls outside of time and only appear determined to our senses, which are governed by our built-in a priori categories of understanding, like space and time.

"I cannot even make the assumption - as the practical interests of morality require - of God, freedom, and immortality, if I do not deprive speculative reason of its pretensions to transcendent insight. For to arrive at these, it must make use of principles which, in fact, extend only to the objects of possible experience, and which cannot be applied to objects beyond this sphere without converting them into phenomena, and thus rendering the practical extension of pure reason impossible. I must, therefore, abolish knowledge, to make room for belief." (Preface to Second Edition, Critique of Practical Reason)

Hegel (1770-1831)
"Philosophy is the History of Philosophy"
Schopenhauer (1788-1860)
"Man can do what he wills, but he cannot will what he wills."
Peirce (1839-1914)
"Idealism without Materialism is void. Materialism without Idealism is blind."
William James (1842-1910)
"My first act of free will shall be to believe in free will."
Nietzsche (1844-1900)
"We no longer have any sympathy today for the concept of 'free will'."
Royce (1855-1916)
"You are not morally free to change laws in this world. But you are moral and free because you are in the eternal sense a part of the World-Creator."

"I believe evil is part of a good order."

Whitehead (1861-1947)
Russell (1872-1970)
"Where determinism fails, science fails." (Determinism and Physics, p.18)
Popper (1902-1994)
"First of all, I do of course agree that quantum theoretical indeterminacy in a sense cannot help, because this leads merely to probabilistic laws, and we do not wish to say that such things as free decisions are just probabilistic affairs."

"Indeterminism is necessary but not sufficient to allow for human freedom and especially for creativity."

Sartre (1905-1980)
Man is condemned to freedom, which is absurd without values.
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