single command hierarchy

A single command hierarchy is an absolute monarchist, fascist, criminal gang, mafia or corporatist model. All organization protocols in this model terminate with a final unappealable decision by one person at "the top" of the command hierarchy. Even if other hierarchies exist, e.g. legislative, judicial, religious, academic, military, press, these are subordinated to the rule of the one. Examples:

Arguably, all corporate CEOs could go on this list, but, only those that actually defy the shareholders to the point of cheating them and/or the employees, probably should. Reputedly this includes Conrad Black, Bernard Ebbers, Jeffrey Skilling and Garth Drabinsky, all of whom exercised "imperial" control of the company and assets with which they were entrusted. A corporate leader however does not typically control more than very minimal security guards and private investigators - this is not an army nor intelligence agency, and they do not usually seek political offices, at least not while acting as the corporate head - though Silvio Berlusconi and Louis XIV are exceptions.

While George W. Bush and Elizabeth I are often placed on this list, this is not strictly correct. Elizabeth I was in check due to a (weak) parliament, a divided Church hierarchy, a judiciary that was somewhat independent on many matters, and a weak state within a contentious Europe. And George W. Bush is answerable to a Supreme Court, NATO and UN allies, and even sometimes asks the Security Council for permission before invading countries.

That said, there is even an argument to remove Adolph Hitler, as the German General Staff under Hitler retained very considerable latitude right up until the Generals' Plot in the very late stages of the war. Hitler did, however, have hire and fire authority over them all, though he did not ALWAYS use it against the Staff's advice.

No modern organization, nation, or party relies on a single command hierarchy to make all decisions. In democracy, those who adjudicate the candidate protocol and related organization protocols like the member protocol must not be answerable ultimately to only one candidate in the leadership race.

Even in an army, some non-commissioned officers do not answer directly on all matters to commissioned officers but to a Quartermaster hierarchy. And, an army in any nation is answerable to the civilian political leadership, and increasingly to the World Court in The Hague.