
Lessons of October (Russian:Уроки Октября) is apolemical essay of about 60 printed pages in length byLeon Trotsky, first published inMoscow in October 1924 as the preface to the third volume of hisCollected Works. The essay was harshly critical of the purported revolutionary failings ofGrigory Zinoviev andLev Kamenev, two key members of the collective leadership which briefly ruledSoviet Russia in the months after the death ofV. I. Lenin. Publication of the essay was used as a pretext for the Soviet leadership to isolate and attack Trotsky, whom the leadership mutually perceived as a threat to accede to supreme power.
In subsequent years Trotsky's essay was reprinted several times under its own covers by the internationalTrotskyist movement.

Following a series ofstrokes, which had incapacitated him for more than a year, Soviet leaderV.I. Lenin died on January 21, 1924, at the age of 53. Despite his chronic illness, Lenin's premature death nevertheless came as a shock both to the people of theSoviet Union and to the small circle of individuals who collectively ruled in his stead through the governing Central Committee of theRussian Communist Party (bolsheviks) [RKP(b)] and its inner executive committee, thePolitburo.
A triumvirate wielded effective power from the time of Lenin's second health breakdown in December 1922, which effectively eliminated his participation in day-to-day operational affairs.[1] This trio includedGrigory Zinoviev, a close associate of Lenin's for more than two decades who sat as the head of theCommunist International; Zinoviev's co-thinkerLev Kamenev, acting chair of the formal Soviet state apparatus, theCouncil of People's Commissars and secretary of the Politburo; andJoseph Stalin, secretary of theOrganization Bureau of the RKP(b), in charge of party affairs and the assignment of party workers to various tasks. Standing aloof from these was the orator and journalistLeon Trotsky, who had returned from North American exile to join the Bolsheviks early in 1917 to be placed in positions of trust at Lenin's right hand.
It would ultimately be Trotsky, as the flamboyant chairman of thePetrograd Soviet, who would play a leading role in theOctober Revolution which brought the Bolshevik Party to power; Stalin would play a lesser and more administrative part. As for Zinoviev and Kamenev, the pair stood aloof from the revolutionary uprising entirely, jointly distancing themselves from a forthcoming Bolshevik seizure of power in the pages of aMenshevik newspaper. This would prove to be a massive miscalculation that would undercut Zinoviev's and Kamenev's later efforts to achieve leadership of the Russian Communist Party and the Soviet republic.
All of these four maintained a desire and made active efforts to win for themselves the mantle of leadership. The threeOld Bolsheviks — Zinoviev, Stalin, and Kamenev — were filled with personal antipathy towards the long-time outsider, Trotsky. Each of the four sought to demonstrate the righteousness of their claims not just through the crass craft of political organization for factional warfare, but also through theoretical acumen. Each began the feverish publication of new works of sociology orMarxist theory or collected their contemporary journalism in an effort to prove themselves abletheoreticians. Trotsky, in an effort to prove his credentials as a theoretician, even launched a multi-volume publishing project for the release of hisSochineniia (Collected Works) involving the State Publishing House.
It would be this publishing effort amidst this highly personalized faction fight that would lead to the publication of the polemical essay "Lessons of October."

On January 18, 1925, a plenary meeting of the Central Committee of the RKP(b) was called to address the so-called "Trotsky Question".[2] Feeling isolated and discredited among the top leadership, Trotsky decided to resign his position as People's Commissar of War rather than to attempt to marshal his forces for a hopeless fight at the Central Committee plenum.[3]
In a lengthy letter of resignation, Trotsky explicitly denied that "Lessons of October" had been published furtively or that it represented a "platform" for a formal opposition faction, as his detractors contended:
"In so far as a formal pretext for the latest discussion was found in the foreword to my book on1917, I consider it my duty, first of all, to refute the accusation that I had published the book without the knowledge of the Central Committee. In point of fact, this book was printed during my rest cure in theCaucasus, exactly in the same way as all the other books written by me or by any members of the Central Committee or of the party. Of course, it is the business of the Central Committee to establish some form of control over party publications, and I never had cause or inclination to avoid such control.
"The foreword [on] 'The Lessons of October' contains the development of those ideas which I have expressed before and especially during the last year.... It goes without saying that in analyzing the October Revolution in connection with the German events, I never dreamed of creating a separate 'platform' or ever entertained the idea that my work would be interpreted in that sense."[4]
Trotsky's resignation was unanimously accepted by the Central Committee at the January 18 session, which he did not attend.[5] Efforts there by Zinoviev and Kamenev to remove Trotsky from the Politburo and to expel him from the party were turned aside, however.[5]
The resolution passed by the Central Committee on January 18 demanded that Trotsky demonstrate "submission to party discipline, not only in words but also in deeds," to issue an unconditional renunciation of his criticisms, and threatened his removal from Communist Party leadership in the event he made "new attempts to violate, or failed to carry out" party decisions.[5] A campaign to "enlighten" the party and the non-party population about the purported anti-Bolshevik nature of Trotskyism was announced.[5]