In the 21st century, linguistic arguments have placed the Proto-Uralic homeland possibly around the Kama River or, more generally, close to the Great Volga Bend and the Ural Mountains, although Petri Kallio, while agreeing with the placement of the homeland in Central Russia, prefers the Volga-Oka region further to the west. The expansion of Proto-Uralic has been dated to about 2000 BC (4000 years ago), and its earlier stages go back at least one or two millennia earlier. Either way, this is considerably later than the earlier views of the continuity theories, which would place Proto-Uralic deep into Europe.
