Trotskyism originated from Trotsky's opposition against Stalin in the theoretical struggle towards a scientific interpretation of Leninism for the case of world revolution. In contrast to Marxism–Leninism, it emphasizes the abolition of bureaucratic dictatorship. It also advocates for a militant workers' revolution, unlike social democracy, and rejects the alliance between the proletariat and the peasantry.

Trotsky and his followers joined the bourgeoisie and their henchmen, the Mensheviks, in a campaign to convince the workers, peasants and communists that socialism was impossible in the Soviet Union. They tried to undermine the confidence of the working people using an argument opposed to Lenin’s standpoint. The only conclusion is that Trotskyism played a counterrevolutionary role, hiding behind pseudo-left rhetoric. Promoting defeatism was the essential role of Trotskyism in regard to the Soviet Union.

https://en.prolewiki.org/wiki/Trotskyism