Summary of Becoming by Michelle Obama - Book Summary - Book Addict In the book, "Extreme Ownership" , Jocko Willink states that a group is only as good as their leader. A true leader cannot lead alone, rather, they require a group behind them that is focused on the goal. Also, a leader can only be considered a good leader when their team reaches their goals on a regular basis. Willink describes that the leader needs to be modest and realize once they...