Considérations sur les causes de la grandeur des Romains et de leur décadence : suivis du Dialogue de Sylla et d'Eurate et de Lysimaque // [Considerations on the causes and the grandeur of the Romans and on their decadence: followed by the dialogue of Sulla and Eurate and of Lysimachus] Charles de Secondat Montesquieu 1858 2 substantive philosophy of history Modern historiography and historical consciousness civilization(s) progress/decline