Research shows that people are more likely to make a charitable gift to a single needy individual than to an entire impoverished region. We are wired to feel things for people, not for abstractions. Sometimes the hard part is finding the right emotion to harness. For instance, it’s difficult to get teenagers to quit smoking by instilling in them a fear of the consequences, but it’s easier to get them to quit by tapping into their resentment of the duplicity of Big Tobacco.

The most basic way to make people care is to form an association between something they don’t yet care about and something they do care about.

The lesson for the rest of us is that if we want to make people care, we’ve got to tap into the things they care about. When everybody taps into the same thing, an arms race emerges. To avoid it, we’ve either got to shift onto new turf, as Thompson did, or find associations that are distinctive for our ideas.

The story’s power, then, is twofold: It provides simulation (knowledge about how to act) and inspiration (motivation to act). Note that both benefits, simulation and inspiration, are geared to generating action. In the last few chapters, we’ve seen that a credible idea makes people believe. An emotional idea makes people care. And in this chapter we’ll see that the right stories make people act.

But emotionally intelligent signage goes deeper. It achieves those same ends by enlisting the principles of “make it personal” and “make it purposeful.” It tries to move others by expressing empathy with the person viewing the sign (that’s the personal part)...