Plato asserted that God applied the four components while in the generation of the planet. Heraclitus attributed to fire the vital drive for generation. The invention of gunpowder in China led into the fire lance, a flame-thrower weapon dating to about 1000 CE which was a precursor to projectile weapons https://carparkextractsystems68901.actoblog.com/37248735/new-step-by-step-map-for-fire-rated-ductworth-insulation