This document discusses systems theory and organizational change from multiple perspectives. It begins by introducing systems theory, noting that organizations are open systems that interact with their environment. It then discusses organizations as hierarchical systems with subsystems and supra systems. It covers defining and reactions to organizational change, including models of diffusion of innovation and levels of resistance to change. The document also discusses cultural diversity in organizations and Hofstede's model of cultural dimensions, including power distance, individualism vs collectivism, masculinity vs femininity, uncertainty avoidance, long vs short term orientation, and indulgence vs restraint. It provides examples of these dimensions across countries and discusses how cultural differences can influence communication and organizational functions.