The four roles described by Kantor are the initiator, the blocker, the supporter, and the observer. The initiator is the one to begin things and come up with plans and new ideas. The blocker will try to find something wrong with the plans of the supporter. The supporter will typically side with either the blocker or the initiator. Lastly, the observer just notices what goes on around them. The most important role to group dynamics is that of the blocker. Though they are often negative and can hinder progress, they bring insight that may have otherwise not been brought up. With the case of captain Van Zanten and the horrific crash, he was the initiator and his copilot was the blocker. Had Van Zanten listened to his copilot and really
