Diversity is the foundation of productive group decision-making, but we can’t underestimate how hard it is to maintain. We all tend to gravitate toward people who are near clones of us. After all, it feels good to hear our ideas echoed back to us. If there is any doubt about how easy it can be to fall into this confirmatory drift, we can even see this tendency in groups we consider some of the most dedicated to truthseeking: judges and scientists.
