This chapter discusses power, politics, and persuasion in organizations. It defines power as the ability to influence others and identifies five bases of power: legitimate, reward, coercive, expert, and referent. Contingencies of power include substitutability, centrality, discretion, visibility, and differentiation. The chapter also examines how information and uncertainty relate to power. It explores the role of power in sexual harassment and office romances. Organizational politics and six types of political activity are described. Conditions that encourage politics are identified, as are ways to control dysfunctional politics. Key aspects of persuasive communication are summarized.