Stalin did not suffer from a psychosis (which is the word nowadays preferred by doctors for madness). Unlike people who are classified as mentally ill, he did not experience episodes which stopped him functioning with day-to-day competence at work. He was not a paranoid schizophrenic. Yet he had tendencies in the direction of a paranoid and sociopathic personality disorder. There was something very odd about him, as his close comrades sooner or later discerned: he was not fully in control of himself. Unease in his presence was not a new phenomenon. From boyhood onwards his friends, while recognising his positive qualities, had noted a deeply uncongenial side. He was extraordinarily resentful and vengeful. He coddled his grievances for years. He was supremely casual about the effects of the violence he commissioned. In 1918–20 and from the late 1920s he had terrorised mainly people who belonged to social groups hostile to the October Revolution; from the mid-1930s he began to victimise not only such groups but also individuals known personally to him — and many of them were veteran party comrades. His capacity to turn on friends and subordinates and subject them to torture, forced labour and execution manifested a deeply disordered personality.
There were factors in his earlier life which must have pushed him down this road. He had a Georgian sense of honour and revenge. Notions of getting even with adversaries never left him. He had a Bolshevik viewpoint on Revolution. Violence, dictatorship and terror were methods he and fellow party veterans took to be normal. The physical extermination of enemies was entirely acceptable to them. Stalin’s personal experiences accentuated the tendencies. He never got over them: the beatings in his childhood, the punitive regime of the Seminary, the disregard for him as a young activist, the deprecation of his talent in Revolution and Civil War and the assault on his reputation in the 1920s.
This is not the whole story. The environment around him in the 1930s really was a threatening one. His own policies had of course made it so. Nevertheless he had plenty of reason to feel that he and his regime were under menace. At the end of the 1920s he had introduced an order which was widely and deeply detested across the country. His speeches had left no doubt that official policies were of his making. His cult confirmed the impression. Kulaks, priests and nepmen had suffered under the First Five-Year Plan. It was not at all outlandish to presume that millions of victims, if they had survived, thirsted after the removal of Stalin and his regime. He knew that his rivals wanted rid of him and thought him unreliable, stupid and dangerous. He got used to planning on his own and to discarding associates at the least sign that they refused to go along with him. He saw enemies everywhere and intended to deal with all of them severely, however long he might have to wait. The situation was immensely dangerous. Stalin was an oddball. Culture, life-experience and, probably, basic personality made him dangerous too.
For all his sociability, moreover, Stalin was a lonely man — and such friends as he made were either found wanting in loyalty or died. He no longer had domestic stability or permanent emotional support. His first wife had died young. His life as a clandestine party organiser had been disrupted and unsatisfactory, and he had found it next to impossible to make friends in exile. (Not that he had tried very hard.) His second wife had killed herself; and, among his best friends in power, Kirov had been assassinated and Ordzhonikidze had eventually opposed his strategic ideas. Solitary again, Stalin had no peace of mind. He was a human explosion waiting to happen.
There was a vicious circle in the interaction between what was happening in the country and what he thought about it. His policies had produced a ghastly situation. Millions had died in the course of collectivisation in Ukraine, south Russia, the north Caucasus and Kazakhstan. Repression had been massive in town and countryside. The popular standard of living had plummeted. Resistance had taken the form of rural revolts and industrial strikes, and the ascendant party leadership could not depend entirely even upon the armed forces. Yet rather than change his policies Stalin introduced greater violence to the tasks of governance. Violence in turn bred stronger resentment and this induced Stalin, already a profoundly suspicious and vengeful ruler, to intensify and broaden the application of state coercion. The situation brought out the worst in him. In fact he had plenty of badness in him to be brought out long before he held despotic power. To explain is not to excuse: Stalin was as wicked a man as has ever lived. His was a mind that found terror on a grand scale deeply congenial. When he had an opportunity to implement his ideas, he acted with a barbaric determination with few parallels in world history.