This document summarizes key concepts from Chapter 3 of an organizational behavior textbook. It discusses organizational culture and how it influences managers' discretion and decision-making. Culture is shaped by an organization's founders, past practices, and top management. It is transmitted through stories, rituals, symbols and language. The chapter also examines how the external environment, including factors like regulations, the economy and stakeholders, constrain managers. High environmental uncertainty exists when the external environment is complex and changing. Managing stakeholder relationships is important for organizational performance.