Inertial pressures prevent most organizations from radically changing strategies and structures. - Michael T. Hannan

For wide classes of organizations there are very strong inertial pressures on structure arising from both internal arrangements (for example, internal politics) and from the environment (for example, public legitimation of organizational activity). To claim otherwise is to ignore the most obvious feature of organizational life. Failing churches do not become retail stores nor do firms transform themselves into churches.

A population ecology perspective on organization-environment relations is proposed as an alternative to the dominant adaptation perspective. The strength of inertial pressures on organizational structure suggests the application of models that depend on competition and selection in populations of organizations. Several such models, as well as issues arising in attempts to apply them to the organization-environment problem, are discussed.

Once standards of procedures and the allocation of tasks and authority become the subject of normative agreements, the cost of change greatly increased. Normative agreements constrain adaptation in at least two ways. First, they provide a justification and an organizing principle for those elements that wish to resist reorganization (i.e. they can resist in terms of a shared principle). Second, normative agreements preclude the serious consideration of many alternative responses.