An OrbitCon session brought to my attention to the fact that Steven Pinker spouts a lot of bullshit about the Second Law of Thermodynamics. (The Second Law is, “entropy cannot decrease over time in a closed system.”) In Pinker’s book, Enlightenment Now, he begins by refuting the creationist argument that the Second Law contradicts the theory of evolution. This is easy to do, you just say that the earth isn’t a closed system, and dramatically point at the sun. But Pinker then proceeds to forget about the sun, and argues that the Second Law of Thermodynamics explains poverty. I don’t have the book available, but Pinker has written an essay along similar lines:
Poverty, too, needs no explanation. In a world governed by entropy and evolution, it is the default state of humankind. Matter does not just arrange itself into shelter or clothing, and living things do everything they can not to become our food. What needs to be explained is wealth.
Here’s the thing: creationists are really really wrong about the Second Law. There’s plenty of room to be less wrong than creationists, but still really really wrong. For those of us who have taken an interest in fighting creationism, we know we can just point at the sun and be done with it. But just because you’re familiar with this argument, please don’t mistake that for an understanding of the Second Law. Don’t be like Steven Pinker.
Here I will state and explain a few basic principles about entropy, with the goal of going beyond a mere refutation of creationist arguments.