Rhedi to Usbek in Paris
You went on in one of your letters about the sciences and arts cultivated in the Occident. You are going to think I am a barbarian, but I do not know whether the utility that we derive from them compensates men for the misuse that is made of them every day.
I have heard it said that the invention of bombs alone had deprived all the peoples of Europe of their freedom.  The princes being no longer able to entrust the guarding of their strongholds to the bourgeois, who at the first bomb would have surrendered, have had a pretext for maintaining large corps of regular troops with which they have subsequently oppressed their subjects.
You know that since the invention of powder, there is no longer any impregnable stronghold  ; which is to say, Usbek, that there is no longer any haven on earth against injustice and violence.
I still tremble lest someone finally discover some secret that will provide a quicker path to killing men and destroying peoples and entire nations.
You have read the historians. Mark this : almost all monarchies have been founded only on ignorance of the arts, and have been destroyed only because they were too much cultivated. The ancient Persian empire can furnish us a domestic example. 
I have not been long in Europe, but I have heard sensible people speak of the ravages of chemistry ; it seems to be a fourth scourge that ruins men and destroys them one by one, but continually,  whereas war, plague, and famine destroy them wholesale, but at intervals.
What good did the invention of the compass do us, and the discovery of so many peoples, except to communicate to us their diseases ?  Gold and silver had been established by a general convention to be the price of all merchandise and a guage of their value, because of the fact that these metals were rare and useless for any other purpose : why then did we care whether they became more common, and that to designate the value of a commodity we should have two or three signs instead of one ?  That was just more inconvenient.
But on the other hand that invention has been highly pernicious to the countries that have been discovered. Entire nations have been destroyed ; and those men who escaped death have been reduced to such harsh servitude7 that the story has made Muslims shudder.
Happy the ignorance of the children of Muhammad ! Amiable simplicity so cherished by our holy Prophet, you always remind me of the naïveté of ancient times, and the tranquillity that reigned in the heart of our first fathers !
Venice this 2nd day of the moon of Rhamazan 1717