This document recaps sessions 1-3 of a leadership development program and covers session 4 on common purpose. It defines common purpose as having three key components: occurring within groups, presence in shared visions, aims and values, and role in working with others. It discusses how common purpose involves generating a shared vision, aims and values that group members embrace. It also covers challenges like personalizing a vision versus socializing it with a group. The document provides context on how common purpose relates to collaboration, group decision making and challenges in maintaining a group's shared sense of purpose over time.