In the 1950s it was decided that a building should be erected in Moscow to house the staff of the Warsaw Treaty Organisation. But it was never put up because nobody needed it-any more than they need the whole organisation. The Soviet General Staff exists and this is all that is required to direct both the Soviet Army and all its `younger brothers'.

A triangle is the strongest and most rigid geometric figure. If the planks of a door which you have knocked together begin to warp, nail another plank diagonally across them. This will divide your rectangular construction into two triangles and the door will then have the necessary stability.

The triangle has been used in engineering for a very long time. Look at the Eiffel tower, at the metal framework of the airship Hindenburg, or just at any railway bridge, and you will see that each of these is an amalgamation of thousands of triangles, which give the structure rigidity and stability.

The triangle is strong and stable, not only in engineering but in politics, too. Political systems based on division of power and on the interplay of three balancing forces have been the most stable throughout history. These are the principles upon which the Union of Soviet Socialist Republics is built.

Enormous problems and difficulties are said to lie before the Soviet Union. But Soviet leaders have always been confronted by problems of considerable magnitude, from the very beginnings of Soviet power. Then, too, the collapse of the regime was thought to be inevitable. But it survived four years of bloody struggle against the Russian army; it survived the mutiny of the Baltic fleet, which had itself helped to bring about the Revolution; it survived the mass flight of the intelligentsia, the opposition of the peasants, the massive blood-letting of the revolutionary period, the Civil War, the unprecedented slaughter of millions during collectivisation, and endless bloody purges. It also withstood diplomatic isolation and political blockade, the starvation of scores of millions of those it enslaves and an unexpected onslaught by 190 German divisions, despite the unwillingness of many of its own soldiers to fight for its interests.

So one should not be in a hurry to bury the Soviet regime. It is still, fairly firmly, on its feet. There are several reasons for its stability-the scores of millions of corpses within its foundations, disinterested Western help, the reluctance of the free world to defend its own freedom. But there is one other most important factor which gives the Soviet regime its internal stability-the triangular structure of the state.

Only three forces are active in the Soviet political arena-the Party, the Army and the KGB. Each of these possesses enormous power, but this is exceeded by the combined strength of the other two. Each has its own secret organisation, which is capable of reaching into hostile countries and monitoring developments there. The Party has its Control Commission-a secret organisation which has almost as much influence inside the country as the KGB. The KGB is a grouping of many different secret departments, some of which keep an eye on the Party. The Army has its own secret service-the GRU-the most effective military intelligence service in the world.

Each of these three forces is hostile to the others and has certain, not unreasonable pretensions to absolute power but its initiatives will always fail in the face of the combined opposition of the other two.

Of the three, the Party has the smallest resources for self-defence in open conflict. But it has a strong lever at its disposal-the appointment and posting of all officials. Every general in the Army and every colonel in the KGB takes up his post and is promoted or demoted only with the approval of the Administrative Department of the Central Committee of the Party. In addition, the Party controls all propaganda and ideological work and it is always the Party which decides what constitutes true Marxism and what represents a deviation from its general line. Marxism can be used as an additional weapon when it becomes necessary to dismiss an unwanted official from the KGB, the Army or even the Party. The Party's right to nominate and promote individuals is supported by both the Army and the KGB. If the Party were to lose this privilege to the KGB, the Army would be in mortal danger. If the Army took it over, the KGB would be in an equally dangerous situation. For this reason, neither of them objects to the Party's privilege-and it is this privilege which makes the Party the most influential member of the triumvirate.

The KGB is the craftiest member of this troika. It is able, whenever it wishes, to recruit a party or a military leader as its agent: if the official refuses he can be destroyed by a compromise operation devised by the KGB. The Party remembers, only too clearly, how the KGB's predecessor was able to destroy the entire Central Committee during the course of a single year. The Army, for its part, remembers how, within the space of two months, the same organisation was able to annihilate all its generals. However, the secret power of the KGB and its cunning are its weakness as well as its strength. Both the Party and the Army have a deep fear of the KGB and for this reason they keep a very close eye on the behaviour of its leaders, changing them quickly and decisively, if this becomes necessary.

The Army is potentially the most powerful of the three and therefore it has the fewest rights. The Party and the KGB know very well that, if Communism should collapse, they will be shot by their own countrymen, but that this will not happen to the Army. The Party and the KGB acknowledge the might of the Army. Without it their policies could not be carried out, either at home or abroad. The Party and the KGB keep the Army at a careful distance, rather as two hunters might control a captured leopard with chains, from two different sides. The tautness of this chain is felt even at regimental and battalion level. The Party has a political Commissar in every detachment and the KGB a Special Department.

This triangle of power represents a Bermuda Triangle for those who live within it. The trio have long ago adopted the rule that none of the legs of this tripod may extend too far. If this should happen, the other two immediately intervene, and chop off the excess.

Let us look at an example of the way this triangle of power functions. Stalin died in 1953. Observers concluded unanimously that Beriya would take command-Beriya the chief inquisitor and head policeman. Who else was there? Beriya, his gang of ruffians, and the whole of his organisation realised that their chance to lead had arrived. The power in their hands was unbelievable. There was a special file on every senior party functionary and every general and there would be no difficulty in putting any one of them before a firing squad. It was this very power which destroyed Beriya. Both the Army and the Party understood their predicament. This brought them together and together they cut off the head of the chief executioner. The most powerful members of the security apparatus came to unpleasant ends and their whole machine of oppression was held up to public ridicule. The propaganda organisation of the Party worked overtime to explain to the country the crimes of Stalin and of his whole security apparatus.

However, having toppled Beriya from his pedestal, the Party began to feel uncomfortable; here it was, face to face with the captive leopard. The NKVD had released the chain it held around the animal's neck and it sensed freedom. The inevitable outcome was that the Army would gobble up its master. Marshal Zhukov acquired extraordinary power, at home and abroad. He demanded a fourth Gold Star of a Hero of the Soviet Union (Stalin had had only two and Beriya one). Perhaps such outward show was unimportant, but Zhukov also demanded the removal from the Army of all political commissars-he was trying to shake off the remaining chain. The Party realised that this could only end in disaster and that, without help, it was quite unable to resist the Army's pressure. An urgent request for assistance went to the KGB and, with the latter's help, Zhukov was dismissed. The wartime Marshals followed him into the wilderness, and then the ranks of the generals and of military intelligence were methodically thinned. The military budget was drastically reduced and purges and cuts followed thick and fast. These cost the Soviet Army 1,200,000 men, many of them front-line officers during the war.