This happens when genetically distinct people evoke different reactions from peers and parents and others. And the third association is called an active correlation. This is when people actively select experiences that fit with their genetically influenced preferences. This doesn't mean that there are no environmental influences on behavior, because, for example, it is found to be that a loss of a parent during childhood promotes alcoholism in women. It is also shown that genetics play a big role in influencing people within society.
Leadership is a big quality that everyone has and there is a wide range of variations.
Heritability is what is found to make up a lot of one's personality. For quite some time scientists have been trying to draw a line between heredity and leadership also. There is no single leadership personality. Even intelligence can only go so far with leadership. It also involves how people make decisions, and how they give and carry out rules, how they are involved with a group, and how they inspire and respect others.