Aristotle
As a principal architect of the concept of causality, and the formulator of the four causes, Aristotle's statements on indefinite causes are perhaps his most significant contribution to freedom in the world.
"Nor is there any definite cause for an accident, but only chance, namely an indefinite cause." 1
Aristotle rejected determinism in his statement on chance:
"Causes from which chance results might happen are indeterminate; hence chance is obscure to human calculation and is a cause by accident." 2
His definition of the voluntary will as caused from within an agent (agent-causal theory) is still valid today.
"If we are unable to trace conduct back to any other origins than those within ourselves, then actions of which the origins are within us, themselves depend upon us, and are voluntary (εκουσια - will)." 3

For Teachers
For Scholars

1. Aristotle, Metaphysics, 1025a25

οὐδὲ δὴ αἴτιον ὡρισμένον οὐδὲν του̂ συμβεβηκότος ἀλλὰ τὸ τυχόν: του̂το δ' ἀόριστον.
Metaphysics, Book V, 1025a24

2. Aristotle, Metaphysics, 1065a33

τὰ δ' αἴτια ἀόριστα ἀφ' ὡ̂ν ἂν γένοιτο τὰ ἀπὸ τύχης, διὸ ἄδηλος ἀνθρωπίνῳ λογισμῳ̂ καὶ αἴτιον κατὰ συμβεβηκός, ἁπλω̂ς δ' οὐδενός.
Metaphysics, Book XI, 1065a

3. Aristotle, Nichomachean Ethics, III.v.6

εἰ δὲ ταῦτα φαίνεται καὶ μὴ ἔχομεν εἰς ἄλλας ἀρχὰς ἀναγαγεῖν παρὰ τὰς ἐν ἡμῖν, ὧν καὶ αἱ ἀρχαὶ ἐν ἡμῖν, καὶ αὐτὰ ἐφ' ἡμῖν καὶ ἑκούσια.
Nichomachean Ethics, III.v.6


Chapter 6.6 - Language Chapter 6.8 - Progress
Part Five - Problems Part Seven - Afterword
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