Shadow EmpiresAn original study of empire creation and its consequences, from ancient through early modern times. The world's first great empires established by the ancient Persians, Chinese, and Romans are well known, but not the empires that emerged on their margins in response to them over the course of 2,500 years. These counterempires or shadow empires, which changed the course of history, include the imperial nomad confederacies that arose in Mongolia and