The Proto-Indo-Europeans were the speakers of the Proto-Indo-European language (PIE), an unattested but now reconstructed prehistoric language. Knowledge of them comes chiefly from the linguistic reconstruction, along with material evidence from archaeology and archaeogenetics. Linguistic reconstruction is fraught with significant uncertainties and room for speculation, and PIE speakers can't be assumed to have been a single, identifiable people or tribe. Rather, they were a group of loosely re… (More on Proto-indo-europeans)