The most likely point of origin of…

The most likely point of origin of a language family, according to the linguistic center-of-gravity principle, is in the area of its greatest diversity.

By this criterion, India, home to only a single branch of the Indo-European language family (i.e., Indo-Aryan), is an exceedingly unlikely candidate for the Indo-European homeland, compared to Central-Eastern Europe, for example, which is home to the Italic, Venetic, Illyrian, Albanian, Germanic, Baltic, Slavic, Thracian and Greek branches of Indo-European.

Urheimat (a German compound of Ur- "primitive, original" and Heimat "home, homeland") is a linguistic term denoting the original homeland of the speakers of a proto-language.

Mainstream Urheimat solutions for the origin of Indo-European tongues locate the Proto-Indo-European homeland near the Black Sea.