{Reference Type}: Journal Article {Title}: Slavic Morphosyntax is Primarily Determined by its Geographic Location and Contact Configuration. {Author}: Seržant IA; {Journal}: Scando Slav {Volume}: 67 {Issue}: 1 {Year}: 2021 暂无{DOI}: 10.1080/00806765.2021.1901244 {Abstract}: This paper seeks to identify causal factors constraining the diachronic dynamics of particular morphosyntactic categories of Slavic. It is suggested that the modern inventory of Slavic languages is not a result of accumulation of historically accidental changes and non-changes. Instead, it is argued that macro-areal pressures constrained by the geographic location and the particular language-contact configuration determine the selection of inherited properties for either retention or loss and, subsequently, innovation. I primarily provide evidence from two categories: verbal person-number indexes (subject agreement markers) and partitivity markers and I also briefly discuss some other fusional categories.