81.Although the point cannot be developed fully here, it is worth noting a connection between the social status of the SAS's officers and the role of the Regiment as a military node. In his initial statement of the regiment's philosophy, David Stirling, the founder the SAS, insisted that "the SAS brooks no sense of class. . . . In the SAS we share with the Brigade of Guards a deep respect for quality but we have an entirely different outlook." Quoted in Geraghty, Who Dares Wins, 9. Recently, the British sociologist Keith Macdonald has suggested that potential shifts are currently occurring in the British officer corps that "indicate that professionalism is gaining ground on `Sloanery,' especially in highly professional Regiments like the Parachute Regiment." Keith Macdonald, "Black Mafia, Loggies and Going for the Stars: The Military Elite Revisited," Sociological Review 52, 1 (2004): 106-35. Given the professionalism of the SAS, it might be assumed that the officer corps of the SAS would be as socially diverse as the Parachute Regiment. In fact, the SAS's officer corps is socially elitist. According to one commentator, "The NCOs [in the SAS] prefer their `Ruperts' [officers] to have public school accents. . . . It has been known for perfectly good officers with strong regional accents to fail SAS selection because they are not regarded as proper officers." Rayment, "The Day the SAS Decided." Analysis of Commanding Officers of the SAS affirms this social elitism, as does unsystematic encounters with SAS officers during the course of this research. A disproportionate number of COs and SAS officers interviewed during this research were not only of elite status but also the sons of prominent British families. There are possible institutional reasons for this. In contrast to the Parachute Regiment and Royal Marines, tactical expertise, although a prerequisite, is not decisive for officers among the SAS. Officers are given a brief tour of operational duty as troop commanders, lasting approximately two years, once they have completed their training. However, in the Special Forces, the tactical sphere is monopolized by senior noncommissioned officers who often have a decade or more of experience in the SAS. Rather, the role of officer is operational. Because the Special Forces are involved in politically sensitive missions that often, blur the distinction among pure military activity, intelligence work, and defense diplomacy, the officers' key function is to liaise upward and horizontally with command headquarters in Britain and with in-theatre organizations including embassies, national governments, and nongovernmental organizations from both private and public sectors. The officer's role is to create the appropriate operational links so that SAS teams can perform their tactical work. Accordingly, an elite social background and accent is "what is expected when you are briefing a government minister or a foreign head of state." Rayment, "The Day the SAS Decided."