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Philosophers

Mortimer Adler
Rogers Albritton
Alexander of Aphrodisias
G.E.M.Anscombe
Thomas Aquinas
Aristotle
David Armstrong
Augustine
A.J.Ayer
Mark Balaguer
William Belsham
Isaiah Berlin
Bernard Berofsky
Susanne Bobzien
George Boole
F.H.Bradley
C.D.Broad
C.A.Campbell
Joseph Keim Campbell
Carneades
Ernst Cassirer
Roderick Chisholm
Chrysippus
Cicero
Randolph Clarke
Samuel Clarke
Donald Davidson
Democritus
Daniel Dennett
René Descartes
Richard Double
Fred Dretske
John Earman
Laura Waddell Ekstrom
Epictetus
Epicurus
John Martin Fischer
Owen Flanagan
Philippa Foot
Alfred Fouilleé
Harry Frankfurt
Richard L. Franklin
Carl Ginet
Nicholas St. John Green
Ian Hacking
Ishtiyaque Haji
Stuart Hampshire
Georg W.F. Hegel
Martin Heidegger
R.E.Hobart
Thomas Hobbes
David Hodgson
Shadsworth Hodgson
Ted Honderich
Pamela Huby
David Hume
William James
Robert Kane
Immanuel Kant
Tomis Kapitan
Christine Korsgaard
Keith Lehrer
Gottfried Leibniz
Leucippus
C.I.Lewis
David Lewis
John Locke
John R. Lucas
Lucretius
Hugh McCann
Colin McGinn
Michael McKenna
Alfred Mele
John Stuart Mill
Dickinson Miller
G.E.Moore
Thomas Nagel
Friedrich Nietzsche
P.H.Nowell-Smith
Robert Nozick
William of Ockham
Timothy O'Connor
Charles Sanders Peirce
Derk Pereboom
Steven Pinker
Plato
Karl Popper
H.A.Prichard
Willard van Orman Quine
Frank Ramsey
Ayn Rand
Thomas Reid
Charles Renouvier
Nicholas Rescher
Josiah Royce
Bertrand Russell
Paul Russell
Gilbert Ryle
T.M.Scanlon
Moritz Schlick
Arthur Schopenhauer
John Searle
Henry Sidgwick
Walter Sinnott-Armstrong
J.J.C.Smart
Saul Smilansky
Michael Smith
Galen Strawson
Peter Strawson
Eleonore Stump
Richard Taylor
Kevin Timpe
Peter van Inwagen
Manuel Vargas
John Venn
Kadri Vihvelin
G.H. von Wright
R. Jay Wallace
Ted Warfield
Roy Weatherford
Alfred North Whitehead
David Widerker
David Wiggins
Ludwig Wittgenstein
Susan Wolf

Scientists

Margaret Boden
Neils Bohr
Ludwig Boltzmann
Max Born
Stephen Brush
Arthur Holly Compton
Abraham de Moivre
John Eccles
Arthur Stanley Eddington
Albert Einstein
Richard Feynman
A.O.Gomes
Joshua Greene
Jacques Hadamard
Martin Heisenberg
Werner Heisenberg
Pierre-Simon Laplace
David Layzer
Ernst Mach
Henry Margenau
James Clerk Maxwell
Ernst Mayr
Jacques Monod
Steven Pinker
Max Planck
Henri Poincaré
Erwin Schrödinger
Herbert Simon
B. F. Skinner
William Thomson (Kelvin)
John von Neumann
Daniel Wegner
Steven Weinberg
 
Democritus
Democritus and his teacher Leucippus replaced theological and supernatural explanations of phenomena with natural materialist explanations. They assumed the world was completely made of matter, which they postulated to consist of just a few types of invisible particles that could be combined to make all of the visible objects, their properties, and their behaviors.

The fundamental elements of their time - earth, water, air, and fire - were in turn simply compounds of sub-elementary particles they called atoms (indivisibles) in a void or vacuum between the atoms.

"By convention hot, by convention cold, but in reality atoms and void."
(Fragment 117, Diogenes Laertius IX, 72)
Parmenides had denied the possibility of the void with the simple logical argument that if nothing was between two bodies, it follows that they are in contact with one another. Plato and Aristotle generally preferred Parmenides' idea of a continuous filled plenum and opposed the atomists' ideas of discrete particulate objects separated by nothing.

Democritus denied the arbitrariness of phenomena that was implied if they were the free actions of the gods. He replaced that explanation with the idea of deterministic laws governing the behavior of the atoms, and as a consequence explaining all phenomena made of atoms, including human beings and their actions. Leucippus had denied that anything happened at random (μάτην),

"Nothing occurs at random, but everything for a reason and by necessity."
(Leucippus, Fragment 569 - from Fr. 2 Actius I, 25, 4)
All the events in the world would now be connected in an eternal deterministic causal chain with a single possible future, possibly one that would loop back and repeat itself in a cosmic "great cycle."

In denying the gods and their freedom, Democritus was no doubt aware of the negative implications for human freedom and moral responsibility. Would causal material explanations reduce all events to mere happenings, with no room for intentions, purposes, and human wills?

Moral responsibility was very important to Democritus. It was a large part of his reason for eliminating the gods and the idea of fate. Unfortunately, eliminating the gods was impolitic and Democritus' work was shunned by many philosophers, starting with Socrates and Plato.

Nevertheless, his view of atoms and a void working by natural causal laws was such a gain over the traditional view of arbitrary fate and capricious gods, that Democritus simply insisted that determinism provided enough responsibility. In this respect, Democritus seems to anticipate the idea of the semi-compatibilism of determinism and moral responsibilty.

A couple of centuries later, the atomist Epicurus added an element of chance to break the causal chain and provide still more control and moral responsibility than physical determinism could provide, because in his opinion, the strict causal determinism of Democritus was worse that the arbitrary fate of the gods. At least one might appeal to the gods for some mercy.

Epicurus said, in his Letter to Menoeceus, 134,

It is better to follow the myth about the gods than to be a slave of the "fate" of the physicists: for the former suggests a hope of forgiveness, in return for honor, but the latter has an ineluctable necessity.
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νόμωι χροιή, νόμωι γλυκύ, νόμωι πικρόω, ἑτεῆι δ’ ἄτομα καὶ κενόν (Diels Kranz, fragment B125)

Chapter 1.4 - The Philosophy Chapter 1.6 - The Scientists
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