This instinct, to see the evidence the way our groups do, is ancient and powerful. We have evolved, as social animals, to depend on our tribes, the groups we identify with, for our very health and safety. It feels safe to go with what the group says, rather than think independently and take the risk of disagreeing with the group’s belief. That instinct for tribal loyalty may help us feel safe, but as these videos demonstrate, it can badly warp how we see the facts, and overwhelm our ability to keep an open mind and think about things carefully and objectively.