Peter Bellwood

"The archaeological record of Harappan decline in the Indus Valley itself has never revealed any obvious connection with the widely claimed origin for these Indo-European invaders in the Pontic steppes or central Asia. In my view, supported linguistically.. the Harappan decline had nothing whatsoever to do with any Indo-European arrival in Pakistan or India, since this language family had already been present there for several millennia beforehand. (Bellwood 2014, 156)"