The First Technology
Before the wheel, there was the heat. It was the first machine humanity ever built, though we did not build it—we stole it from the [Lightning]. It is an external stomach, digesting the raw materials of the world so that we do not have to.
Fire is [Entropy] accelerated. It is the universe's way of demanding payment for structure. A tree is a battery of sunlight stored over decades; fire releases that century of light in a single hour of violence.
We define civilization by our ability to constrain it. The hearth. The kiln. The internal combustion engine. The reactor. But at its core, it remains wild. It is not matter; it is the [Transition] of matter. It is a dance of electrons screaming as they fall into lower energy states.
"Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life." — Pratchett via Tao