The speech On Peace contains the translation of Demosthenes speech together with a number of footnotes necessary to clarify obscure aspects of the text (mainly information tacitly implied in it), and to convey important aspects of the ruling culture of the 4th century B.C. It is a very valuable document of this period of Hellenic history. The translation is presented with an introductory text which allows the reader to anticipate an image of the internal politic troubles caused by the invasion coming from the north which was directed by King Philip of Macedonia and followed by his son Alexander, who finally conquered an empire so far unimagined in its magnitude, and which Droysen called the Hellenistic Empire