Constantine Paparrigopoulos (1815-1891), the founder and "father" of modern Greek historiography, refutes the "paradoxologies" of Fallmerayer regarding the Slavicization of the Greeks. This book is Paparrigopoulos's first historical treatise and serves as a precursor to his five-volume History of the Greek Nation (1860-1877).

The publication of "The History of Morea in the Middle Ages" by the German historian (1830) sparked the genesis of Greek historiography. Paparrigopoulos notes in his preface: "Some have claimed, as is known, that amid the great storms of the Middle Ages the ancient Greek race perished without descendants and that the nation today bearing this illustrious name is a bastard race, a mob of barbarians who have flowed here from the north, west, south, and east."

The extreme theory that modern Greeks have no relation to the ancients but are descended from Slavic and Albanian settlers heightened the Greek inclination towards self-knowledge. This study by Paparrigopoulos inspired later historians, both Greek and foreign, such as Karl Hopf (1872, see no. 1 of the Library of Historical Studies) to continue refuting Fallmerayer's ideas and to study the Byzantium that had been forgotten until then.

The reprint edition features a foreword by Demosthenes Kontou, professor of European History at the State University of New York.