Doxographi Graeci

Established the discipline of doxography - the editing, cataloguing, and analysing of extant classical texts that contain references to lost authors.

Herman Alexander Diels (1848–1922) published Doxographi Graeci in 1879. In many ways this work established the critical discipline of doxography - the editing, cataloguing, and analysing of extracts of extant classical texts that contain references to the ideas and arguments of lost authors and schools. In Doxographi Graeci Diels analyses passages from the extant work of authors such as Plutarch, Arius Didymus, Diogenes Laërtius, Ps-Plutarch, Hippolytus, Ps-Galen, Stobaeus, Theodoret and Eusebius and uses them to uncover information about the Presocratic philosophers and schools whose written treatises are no longer extant. Diels' method of filiation of extant sources, based on the critical methods of his teacher, Herman Karl Usener (1834–1905), allowed critical judgements to be made regarding the reliability and usefulness of extant authors and their references. Diels' magisterial work represented a profound breakthrough in the study of the Presocratic philosophers. It is a monument of classical scholarship.

Prolegomena; Aetii de placitis reliquiae (Plutarchi epitome, Stobaei excerpta); Arii Didymi epitomes fragmenta physica; Theophrasti physic. opinionum, de sensibus fr.; Ciceronis ex L. I de deorum natura; Philodemi ex l. I de pietate; Hippolyti philosophumena; Plutarchi stromateon fr.; Epiphanii varia excerpta; Galeni historia philosophia; Hermiae irrisio gentilium philosophorum.

Diels' Doxographi Graeci (1879) inaugurated the critical discipline of doxography - the editing, cataloguing, and analysing of extracts of classical texts that contain references to the ideas and arguments of lost authors and schools. Diels analyses passages from a range of Greek authors to uncover the ideas of the Presocratic philosophers.