Why narcissism, psychopathy and Machiavellianism (Dark Triad personality traits) are needed

https://youtu.be/Fxu89q2v0N8 Why are narcissism, psychopathy and Machiavellianism—the so-called Dark Triad personality traits—needed for success in a diverse, dog-eat-dog society? Why does a complex human world require narcissism, psychopathy and Machiavellianism for success? Why do human masses crave for narcissistic, psychopathic, and Machiavellian leaders? In the most diverse and dog-eat-dog nations, narcissistic, psychopathic, and Machiavellian people become the greatest leaders. For example, the Ancient Roman Empire had Julius Caesar as its greatest leader, who was narcissistic, psychopathic, and Machiavellian to no end. The people in a position of power, the powerful people are all narcissistic, psychopathic, and Machiavellian, in one way or another. The people in a position of the greatest power, the most powerful people are the most narcissistic, psychopathic, and Machiavellian. In my Unified Humanity Science, I link human pscyhology to human outcomes. I have this conjecture to prove or disprove in my Unified Humanity Science: the more complex and diverse a human environment is, such as in an empire, the more narcissistic, psychopathic, and Machiavellian personality traits are needed for leading and maintaining that human environment. Empires with diverse peoples and colonies are founded and managed by narcissistic, psychopathic, and Machiavellian leaders; that is no coincidence. Narcissism allows and enables being self-centered and pursuing one's goals with determination and resolution against all odds and oppositions. Psychopathy allows and enables setting and pursuing extreme goals, unreasonable goals, for the maximum human achievements. Machiavellianism allows and enables one to devise and employ any means necessary to achieve one's objectives. Hence, the greatest human achievements cannot be without narcissism, psychopathy and Machiavellianism! In my Unified Humanity Science, I will QMASP (Quantify, Model, Analyze, Simulate, and Predict) the exact causes and consequences of narcissism, psychopathy and Machiavellianism at the human-brain tissular, cellular, subcellular, molecular, atomic, and subatomic levels.