How to Invent Everything

locks in 0 degrees as the temperature of a weird slurry of ice, water, and salt that Mr. Fahrenheit threw together before calling it a day, and we will discuss it no further,

. All you need is this book and some water.

instead of each human having to do everything necessary to survive (or splitting it among a family group), now someone who’s particularly talented at farming can focus all their efforts on that.