15 The Horse, the Wheel, and Language: How Bronze-Age Riders from the Eurasian Steppes Shaped the Modern World by David W AnthonyIn which Anthony puts forth his theory that Proto-Indo-European was spoken by nomads on the Pontic-Caspian steppes between roughly 4500 and 2500 BCE, and that they were the first people to domesticate horses (not the ( Read more... )