"“Then, the presence of zebu genes and representations in Asia and Europe seem to be a promising ground of research, and certainly a confirmation that there was an important movement from South Asia to the West. It is difficult to think that this movement was only of cattle without herders, particularly where we find strong archaeological and historical signs of a common culture. (…) Actually, scholars have always thought of Indo-Europeans as the people of the horse and searched for horses in order to find Indo-Europeans. But they were also, and I would say more, the people of the cow”."
January 1, 1970
https://en.wikiquote.org/wiki/Fauna_of_India