By now you probably know that Apple and the FBI are fighting over whether the computer company should create software that could bypass encryption on an iPhone. What you might not know is why this matters to you — to everyone. Dave Troy explains.

Dave Troy makes “people maps,” graphics that visualize cities and communities by people’s interests rather than their geography. Here he looks at the various divides in St. Louis, Missouri and asks if we might use this kind of analysis to predict the next Ferguson.

Dave Troy crunches data to see places not as neighborhoods but as relationships between people.