We had wars before the discovery of oil-as-a-resource, we have had wars well after the discovery of oil-as-a-resource. Arguably most wars were not caused direct

We had wars before the discovery of oil-as-a-resource, we have had wars well after the discovery of oil-as-a-resource. Arguably most wars were not caused directly or indirectly by use of oil-as-a-resource. However, some wars have directly or indirectly been about oil. New kinds of war have been made possible by oil. Again: war existed before the invention of the printing press, and war existed after the invention of the printing press. Arguably most wars were not caused directly or indirectly by the printing press. The use of military hierarchy in warfare predates the printing press. However, in some wars, the cause can be lead back to the use of the printing press, directly or indirectly. And some new forms of warfare are made possible by the printing press. While we can argue how essential a printing press is to the tenets of Protestantism, it is inarguable that the spread of the protestant faith was greatly accelerated by the ability to print pamphlets and disseminate the writings of Martin Luther and other reformers. Protestantism's concept of 'Sola scriptura' also required the translation of the bible into people's local language, and the dissemination of a large number of these translated bibles. Without the printing press this would have been rather tricky. Of course, as a later consequence, the Protestant Reformation then sparked several wars between the new Protestant faith and the Catholics who considered them to be heretics. (Eg the formation of the Netherlands: https://en.wikipedia.org/wiki/Eighty_Years%27_War https://en.wikipedia.org/wiki/Eighty_Years%27_War -- The lead-up: "Charles [V] aspired to counter the Protestant Reformation and keep all his subjects obedient to the Catholic Church." )