By Alhassan M. Kamil Listen to article National security, like any other social science concept is very fluid and has no precise definition. Combing through a swath of definitions, one is gravitated towards the definition provided by Harold Brown as that captures the salient elements of national security. According to Brown, National security is “…the ability to preserve the nation's physical integrity and territory; to maintain its economic relations with the rest of the world on reasonable terms; to preserve its nature, institution, and governance from disruption from outside; and to ...