Introducing new evidence from more than 600 secret Ottoman documents, this book demonstrates in unprecedented detail that the Armenian Genocide and the expulsion of Greeks from the late Ottoman Empire resulted from an official effort to rid the empire of its Christian subjects. Presenting these previously inaccessible documents along with expert context and analysis, Taner Akçam's most authoritative work to date goes deep inside the bureaucratic machinery of Ottoman Turkey to show how a dying empire embraced genocide and ethnic cleansing. Although the deportation and killing of Armenians was internationally condemned in 1915 as a "crime against humanity and civilization," the Ottoman government initiated a policy of denial that is still maintained by the Turkish Republic. The case for Turkey's "official history" rests on documents from the Ottoman imperial archives, to which access has been heavily restricted until recently. It is this very source that Akçam now uses to overturn the official narrative. The documents presented here attest to a late-Ottoman policy of Turkification, the goal of which was no less than the radical demographic transformation of Anatolia. To that end, about one-third of Anatolia's 15 million people were displaced, deported, expelled, or massacred, destroying the ethno-religious diversity of an ancient cultural crossroads of East and West, and paving the way for the Turkish Republic. By uncovering the central roles played by demographic engineering and assimilation in the Armenian Genocide, this book will fundamentally change how this crime is understood and show that physical destruction is not the only aspect of the genocidal process.