The Decline and Fall of the Roman Empire · ¶298

III. But the holy wars which have been waged in every climate of the globe, from Egypt to Livonia, and from Peru to Hindostan, require the support of some more general and flexible tenet. It has been often supposed, and sometimes affirmed, that a difference of religion is a worthy cause of hostility; that obstinate unbelievers may be slain or subdued by the champions of the cross; and that grace is the sole fountain of dominion as well as of mercy. Above four hundred years before the first crusade, the eastern and western provinces of the Roman empire had been acquired about the same time, and in the same manner, by the Barbarians of Germany and Arabia. Time and treaties had legitimated the conquest of the Christian Franks; but in the eyes of their subjects and neighbors, the Mahometan princes were still tyrants and usurpers, who, by the arms of war or rebellion, might be lawfully…

Edward Gibbon · Project Gutenberg #735 (Milman edition) — public domain
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