The one glaring exception—the one thought in the list above that doesn’t seem to fit naturally into a major module—is number 5: looking forward to that beer you so richly deserve. Presumably, evolution didn’t build a “beer-drinking module” into us. But beer, like many other recreational drugs, is an invention that circumvents evolution’s logic: it taps directly into the reward center that normally would be activated more arduously, by doing things that helped our ancestors spread their genes.
