The Leadership Challenge® evolved from research started in 1983 by Jim Kouzes and Barry Posner when they set out to discover what people did when they were at their personal best in leading others. They discovered that certain behaviors were common to leaders who make extraordinary things happen in organizations, and they eventually grouped these behaviors into The Five Practices of Exemplary Leadership®. Today, The Five Practices® are the basis of The Leadership Challenge Model, the most recognized standard of leadership excellence. They are: