The word "security" derives from the Latin words meaning "care for yourself". This definition illustrates why security is 
a basic ecological function.  Although security departments are often peripheral and security measures may be an 
afterthought for business and the individual, security itself is central to how people gain a living.  Any family 
seeking to survive must not only gather its food and supplies, but also protect these from predators.  This fundamental 
principle helps us to think about security in a broader context than locks, bolts, and badges.


"The Changing Ecology of Security", Marcus Felson, Social Science Institute, University of southern California,  Journal of security Administration, 1988