Any field is molded and constrained by its paradigms. A “paradigm” can be defined as:
(1) a pattern, example, or model;
(2) a mode of thought or practice; or
(3) an overall concept or strategy accepted by most people in a given field.
The field of security relies on a number of paradigms, both stated and unstated. Many of these are in the process of changing—or at least should change—in order to adapt to a rapidly changing world and to improve security effectiveness.