De fato

De Fato (English: "Concerning Fate") is a partially lost philosophical treatise written by the Roman orator Cicero in 44 BC. Only two-thirds of the work exists; the beginning and ending are missing. It takes the form of a dialogue, although it reads more like an exposition, whose interlocutors are Cicero and his friend Aulus Hirtius.

In the work, Cicero analyzes the concept of Fate, and suggests that free will is a condition of Fate. Cicero, however, does not consciously deal with the distinction between fatalism and determinism.

It appears that De Fato is an appendix to the treatise on theology formed by the three books of De Natura Deorum and the two books of De Divinatione. These three books provide important information regarding Stoic cosmology and theology.