This is the first work to examine the phenomena of citizen espionage from the point of view of trust betrayal. Here is an effort to illuminate the social, political, and psychological conditions that influence trusted American citizens to spy against their country. The volume combines historical inquiry, sociological studies, psychological insights, and criminological analysis. It is especially timely when many nations, friend and foe alike, have instituted programs to obtain trade secrets and classified technology from American military and industrial sources.