Civilized Science and Technology Book

The Mongolian cavalry traveled ninety kilometers a day, sweeping across the Eurasian continent. There is no stronger cavalry in the world than them. But the one who defeated them was not It's faster and stronger cavalry, but it's gunpowder, and it's those flintlock guns with a killing range of only fifty meters. The decline of the European knight class is not because knights neglected training or lost the five virtues of knights, but because of the emergence of crossbows, crossbowmen who can inflict damage on knights with just one day of training. The horses gradually disappeared from view because Watt's steam engine drove the four-wheeled iron beast. Battleships were no longer invincible at sea because the Wright brothers got airplanes airborne. Sometimes the decline of something is not because it did not do well enough, but because of a blow from a higher dimension. This is the power of technology.