This document discusses the importance of psychology in stakeholder management. It identifies some key challenges project managers face in dealing with stakeholders, such as identifying powerful stakeholders early, influencing without authority, and effective negotiation. It then provides guidance on how to address these challenges, drawing from experts in psychology and negotiation. The document emphasizes understanding sources of power, using principles of persuasion to influence others, focusing on interests rather than positions in negotiation, and building relationships with stakeholders through effective communication and collaboration.