Why being nice is not always a virtue in the eyes of psychology

Ideas & Philosophy · Published 3 October 2026 Swipe more like this →

In short: Agreeableness is a core personality trait defined by kindness, cooperation, and empathy. While it fosters social harmony and longevity, it is not purely positive. High agreeableness can lead to submissiveness under authority, and its relationship with cognitive ability is surprisingly complex, revealing that being nice has hidden costs.

Agreeableness is one of the Big Five personality dimensions, a framework rooted in the 1936 work of Gordon Allport and Henry S. Odbert. It functions as a superordinate trait, clustering sub-facets like trust, altruism, and compliance. While the modern Big Five model popularized by Lewis Goldberg in the 1980s treats it as a distinct factor, alternative models like HEXACO argue that agreeableness should be split. HEXACO researchers Michael Ashton and Kibeom Lee suggest that honesty-humility—encompassing straightforwardness and modesty—is a separate dimension from the tolerance and cooperation typically associated with agreeableness.

The social benefits of agreeableness are well-documented. Agreeable individuals are more likely to control anger, prioritize social harmony, and engage in altruistic behavior without needing external incentives. This trait is linked to better mental health, higher social status among peers, and even increased longevity. Conversely, low agreeableness is associated with hostility, prejudice, and, in extreme cases, traits found in the dark triad, such as narcissism and antisocial behavior. Studies have shown that ill-tempered children often face greater challenges in adulthood, including lower educational attainment and higher rates of divorce.

However, agreeableness is not a universal good. In the famous Milgram experiments, agreeable individuals were more likely to follow orders from an authority figure to inflict pain on others, suggesting a diminished capacity for resistance. Furthermore, the relationship between agreeableness and intelligence is nuanced. While often assumed to be uncorrelated, meta-analyses show that specific facets have meaningful connections to cognitive abilities; for instance, compassion correlates positively with general mental ability, while politeness shows a negative correlation with general science knowledge. Ultimately, agreeableness is a double-edged sword, shaping how we navigate social hierarchies, resolve conflicts, and respond to the demands of authority.

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