Fear truly is the mind-killer. We know from brain research that people quite simply do not have access to higher-order brain functions when in fight-flight-freeze mode. Our body devotes all of its power to simple survival. While fear might motivate someone to physically act and to teach behavioral obedience, it puts up barriers for critical thought.
Perhaps this is why we see so much fear in politics and the media. What better way is there to keep people from seeing the magician-style illusions that go on in or world? While our brains focus on the fear that has been placed before us, we miss the chance to fully reflect and evaluate the actual state of our world and our lives.