Our conversation will be informed by the work of Brian Boyd, a scholar from New Zealand, and the author of an important book: “On the Origin of Stories.” The title evokes Darwin and evolutionary theory. It works this way: Our brains evolved to give us language; and that language gave us the ability to tell stories, even fictional ones.

We would not have that capacity, if stories did not help the species survive in these ways:

1. Stories enrich our experience. If experience is a teacher, consider how much more we learn, from inspiring and cautionary tales, about the nature of the human condition, its triumphs and tragedies.

2. Stories point us to dangers. Think of the way that citizens were informed — or misinformed — by the coverage of events in Boston last week. Despite the misinformation journalists spread, the purpose of their reports was clear in most cases: there was a danger to the public safety, and that danger had to be identified and neutralized.

3. Stories teach us how to collaborate. To fight against the dark side, people of good will almost always need to find ways to work together, and stories offer examples of how that can be done.