Translate the following English sentence to French:
"No doubt if Rome, Byzantium, Spain and Europe had had such plans, then Alaric, Attila, the Saracens, Tamburlaine, the Ottomans, the sack of Rome, the fall of Constantinople, the raids on the Mediterranean coasts and centuries of fear could all have been prevented."
Si Rome, Byzance, l' Espagne, l' Europe avaient eu ces plans, personne ne doute évidemment que l' on eût évité Alaric, Attila, les Sarrasins, Tamerlan, les Ottomans, le sac de Rome, celui de Constantinople, les razzias sur les côtes méditerranéennes et des siècles de peur.