Ward Goodenough

"Gimbutas, following most recent Russian work, has departed from Childe, to the extent of deriving the Kurgan cultures from the steppes on the Lower Volga and farther east (…) While linguistic opinion has been moving in the direction of putting the Indo-European homeland in the region of the Vistula, Oder or Elbe, archaeological opinion is now putting it in the Lower Volga steppe and regions east of the Caspian Sea."