Original sentence: Leninism's direct theoretical descendants are Marxism-Leninism associated with Joseph Stalin and Trotskyism, associated with Leon Trotsky.One development of Marxism Leninism is Maoism.Proponents of each theory (including as Stalin and Trotsky themselves) often deny that the other is a "real" Leninist theory, and claim that their own interpretation is the truest successor to Lenin's ideas.Stalin and Trotsky were associates of Lenin who became the leaders of the two major political and theoretical factions that developed in the Soviet Union after Lenin's death
Edited sentence: Both such groups, and others, often describe their theories as Marxism-Leninism.Leninism's direct theoretical descendants are Marxism-Leninism, Trotskyism and Maoism, first formulated by Joseph Stalin, the second Leon Trotsky and the last Mao Tse Tung.Proponents of each theory (such as Stalin and Trotsky themselves) often deny that the other is a "real" Leninist theory, and claim that their own theory is the only true successor to Lenin's ideas.The first two were associates of Lenin who became the leaders of the two major political and theoretical factions that developed in the Soviet Union after Lenin's death