explain a puzzle in our lives or to help us through trauma. These stories are narratives that provide new truths by denying particular elements of reality. They represent the mind’s method of filling in gaps, providing justifications for what we can’t explain or wish to explain in a different way. This is an adaptive feature of the human mind, one that is uniquely human. But this same feature can be used to justify immoral and atrocious behaviors, the kind that lead to excessive harms. When we distort reality by treating others as non-human, perceiving and judging them as animals, parasites, or machines, we have armed ourselves with a weapon that enables great harms by removing the moral consequences of our actions. Animals, parasites and machines are outside of our moral concerns, so we shouldn’t feel guilty, or wrack our conscience when we end their lives or ability to move. Animals, parasites and machines don’t have rights, and thus, we have no obligation to them. Similarly, when we distort reality by means of deception and self-deception, we have armed ourselves with weapons that enable desire to run wild. Self-deception generates overconfidence. Overconfidence enables us to pursue our desire for power, freed from the reins that pull us back, away from costly interactions. Self-deception allow us to convince ourselves and deceive others that we are under attack, threatened by those who are unlike us. Under the circumstances, we are justified in using self-defense, even if this leads to annihilating the enemy. Often, self-deception combines with dehumanization to maximize the effectiveness of the distortion, paving an unobstructed path for runaway desire. Denial enables desire to achieve satisfaction, minus the moral conscience. These are the ideas that I will explore in this chapter. Before discussing the scientific evidence that explains how the brain distorts reality by dehumanizing and self-deceiving — two core elements of denial — we must understand how the