1. Organizations are open systems that depend on their environment to survive and must adapt to changes in order to grow.
2. Different types of organizations, or "species", thrive in different environments, such as bureaucratic organizations in stable environments and adhocracies in turbulent settings.
3. Contingency theory posits that there is no single best way to organize and the appropriate structure depends on factors like the task and environment. Management must ensure a good fit between the organization and its context.