A Republican Party foreign policy apparatchik
Author of America Alone
Halper is the co-author of the America Alone, and a leading Republican Party critic of the neoconservative movement and its ideology adopted by George Walker Bush and senior members of his administration. 
Halper is married to the daughter of Ray S. Cline, who was a senior official in the CIA.
- Centre of International Studies Dr Stefan Halper
- Eleanor Hall Republican Insider Admits Administration's Diplomacy Failure, ABC, 21 February 2003.
- Cambridge University Press America Alone