A large-scale study finds that adverse societal conditions like corruption, inequality, poverty, and violence are linked to higher levels of dark personality traits such as selfishness and moral disregard across countries and US states, suggesting that social environments influence personality development.
A study published in Dreaming has found a link between dark personality traits, such as psychopathy, narcissism, Machiavellianism, and sadism, and dream content. Individuals with these traits are more likely to have dreams containing elements of aggression, sexuality, and grandiosity. The study suggests that a person's waking life influences their dream content, and the findings support previous research showing a connection between personality traits and dream content. However, the study also found that sadism, rather than psychopathy or narcissism, was a significant predictor of sexual and grandiose dreams, which puzzled the researchers. The study highlights the need for further research to understand this relationship.