Terms of Enlightenment

What scientific term or concept should be more widely known in the year ahead? Six answers from leading thinkers.

The Second Law of Thermodynamics (Steven Pinker), Life History (Alison Gopnik), Positive Illusions (Helen Fisher), Common Sense (Jared Diamond), The Law of Small Numbers (Adam Alter), Complementarity (Frank Wilczek), The Copernican Principle (Mario Livio), Effective Theory (Lisa Randall)