Lippmann uses this story to illustrate that we do not react to the real world, but to a —a mental map of the world that we build from reports, stories, and pictures. The Reality: World War I had begun.

The people on the island acted based on their mental picture of peace, even though the reality was war. Key Takeaways from the Book

Lippmann coined the modern use of the term "stereotype," describing them as mental shortcuts we use to simplify a complex world. We "define first and then see," rather than seeing the world as it truly is.