In his paper “Indo-Europeans were the Most Historically Significant Nomads of the steppes,” Cliodynamics, vol. 4, 2013, pp. 30-43, Ricardo Duchesne gives us a fascinating glimpse at European pre-history. The Indo-Europeans were a pastoral people who originated from the Pontic Caspian steppes, and in the fourth millennium BC, culturally colonised Europe through their use of what at the time was advanced technology, such as the domestication of horses, the use of wheeled vehicles and the invention of chariots.