There are a lot of problems with the South Slavic classification. It is really hard to believe that Slovene and Bulgarian had a proto-South Slavic ancestor when Slovene is closer to Slovak and Czech while Bulgarian is closer to Russian and Ukrainian than they are to each other. No doubt that there was a proto-Western South Slavic language (Serbo-Croatian, Slovene) and a proto-Eastern South Slavic language (Bulgarian, Macedonian), and no doubt that these languages had a common ancestor. However, their ancestor is NOT proto-South Slavic, but proto-Slavic (or Common Slavic) itself. The relation between Slovene and Bulgarian is no different than that of Slovene and Polish. It appears to me that the whole South Slavic grouping has been influenced by Yugoslav nationalism, but maybe I am wrong? Is there any evidence of a proto-South Slavic language that was distinct from the Eastern and Western proto-Slavic tongues? If there is, please show it to me, because I have seen none.