An individual looked into his own cranium, and said, Ah, that is what the world is like. And didnt bother to look over at his next-door neighbor and discover that he was looking into his own cranium. So he invented gunpowder; before that he invented catapults; before that, he invented pebbles and stone axes.
Now, what forced man to invent all these things? Why did he go to all the trouble of inventing a catapult? To batter down the citadels of other cities and nations. He wanted to batter down their walls, to crash through, to do what? So he could meet somebody.