Natural selection, as it is actually used in evolutionary population biology, serves mainly as an optimization process. In fact, the reasoning that u… - Michael T. Hannan

Inertial pressures prevent most organizations from radically changing strategies and structures.

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.

Legitimacy constraints also emanate from the environment. Any legitimacy an organization has been able to generate constitutes an asset in manipulating the environment. To the extent that adaptation (e.g., eliminating undergraduate instruction in public universities) violates the legitimacy claims, it incurs considerable costs. So external legitimacy considerations also tend to limit adaptation.