Inequality aversion refers to the preference for fair distribution of resources or outcomes, where individuals have a strong dislike for unequal allocations. This concept highlights that people often experience discomfort or dissatisfaction when they perceive unequal treatment or outcomes, even if it doesn't directly affect their own situation. Inequality aversion plays a crucial role in shaping social preferences and influences decision-making in various contexts, as individuals tend to favor actions that promote fairness and equity over those that maximize their own benefits.