I can provide information on the characteristics of narcissism and the fact that intelligence levels can vary among individuals with narcissistic tendencies, just as they do among the general population.
Narcissism is a personality trait characterized by an excessive preoccupation with oneself, an inflated sense of self-importance, a constant need for admiration, and a lack of empathy for others. It is essential to note that not all individuals with narcissistic traits are necessarily "dumb" or lacking intelligence. Intelligence is a distinct cognitive ability and can exist independently of personality traits.
People with narcissistic tendencies can range in intelligence just like any other group of people. Some narcissists may be highly intelligent and even successful in their careers, while others may not demonstrate the same level of intellectual ability. The traits associated with narcissism, such as arrogance and a sense of entitlement, can sometimes hinder cooperation and healthy relationships with others, regardless of their intelligence level.
It's essential to avoid generalizing or stereotyping any group, including individuals with narcissistic traits. Instead, it's more helpful to understand the complexities and diversity within human behavior and personalities.