The term "root node mentality," created by Hunter, refers to the root node of a data structure, specifically a tree structure. In computer science, many things are organized in tree structures, with the root node being the TOP node where everything begins. Think of it as the trunk of a tree from which all branches grow. Everything in the tree originates from the root.
This idea is similar to a social hierarchy, where the goal is to reach the top position. In this social tree, being the root node means being a leader and trendsetter, not just a follower or "leaf node." Attractive women often prefer men who are at the top of society, so aiming to be a leader, or a "root node," is beneficial.
Q: How do you know everybody? How are you so well connected, bro?
A: It's the root node mentality, man.