Organization culture reflects shared values, assumptions, and norms that unite employees. It affects how employees feel and act. Cultures must evolve to survive changing conditions like economic crises, laws, technology. Culture changes when organizations solve problems. Culture can facilitate or inhibit change, which is needed when culture hinders goals. Environmental and internal forces stimulate change. Top leaders set the tone for culture and change by involving stakeholders, building on shared values, and teaching new members. Change targets include individuals, groups, the organization, and the environment. Successful change agents establish urgency, form supporter coalitions, create and communicate a vision, empower others, plan short-term wins, consolidate improvements, and institutionalize new approaches.