At the time of the earliest reconstructible dialectal divergences, which belong to the Late Middle Slavic period of my chronology (stages 7.0 - 8.0 of Kortlandt 1989a, 2003, 2008), the West Slavic languages represented the most conservative part of the Slavic dialects (cf. Kortlandt 1982b: 191 and 2003: 231)
