What makes a person slip from being passionate, but reasonable, to radicalized and unreasonable? It’s a question many across the country are asking because, in the U.S., the rate of radicalization is on the increase, more so than in other developed countries. The answers are still evolving, and they’re coming mostly by looking back and seeing what’s different today. Among the factors identified, a culture more and more upheaved, the speed at which ideas spread through social media, and changing political parties. Get the full story from WIRED.