Fragments
A rigorously systematic logic and a fully deterministic account of fate can be reconciled with genuine human moral responsibility, since assent to an impression, though caused, is still the agent's own act.
- propositional logic rivaling Aristotle
- compatibilism: fate and moral responsibility reconciled
- assent to impressions as the agent's own act
- systematizing and 're-founding' the Stoic school
- survival only through fragments and later summary
Chrysippus of Soli, who became head of the Stoic school around 230 BC and was so prolific, reportedly authoring over seven hundred works, that the saying arose 'if there had been no Chrysippus, there would have been no Stoa,' effectively re-founded Stoicism as a comprehensive, systematized philosophy. None of his voluminous output survives except in fragments and later summary, but these preserve his major contributions: a formal propositional logic rivaling Aristotle's syllogistic, and an influential defense of compatibilism, the position that a fully deterministic, fated universe remains compatible with human moral responsibility because assent to an impression is still an act the mind itself performs.
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