#11 Why Science Rejects Teleology We see purpose in everything — but science explains the world without ends in mind Teleology is the idea that things happen for a purpose — that events or structures exist in order to fulfill some goal. It’s how we naturally explain much of life: birds build nests to protect their young , people exercise to stay healthy , and seeds sprout to become trees . These explanations are so intuitive that they can feel like common sense. But science does not allow teleological explanations — at least not as a foundation for understanding the natural world. In science, causes must come before effects. You can’t explain something by appealing to what it will eventually accomplish. Instead, you have to explain it in terms of prior conditions, physical laws, and step-by-step processes. If sodium and chlorine atoms come together to form salt, it’s not because they intend to make salt — it’s because the nature of their charges and electron structures causes ...