Human life depends absolutely on cooperation. Unlike other animals, we don’t have big fangs, sharp claws, or leather-thick hides. Instead, we have our ability to work efficiently with each other. In modern industrial civilization, we take this flair for cooperation to the next level, depending each day on thousands of strangers to bring food to our cities, keep the roads clean, and mine coal to power our homes. And it just might be religion that makes this all possible.