Die Vorgeschichte des slavischen Aoristsystems proposes a new look on the paradigmatic organization of the finite verb in Proto-Slavic. It rests on the study of the diachronic and synchronic conditioning of paradigmatic preferences of Proto-Slavic primary verbs and is shown to account for the complementary distribution of partially syncretistic aorist stem formations into six classes (bases of the systematic description adopted here). Major development trends reveal clear parallels with other Indo-European branches. Along with the discussion of paradigmatic constellations, diachronic...