 Within five years of the death of Vladimir Lenin (1924), Joseph Stalin completed his rise to power and was the leader of the Soviet Union who theorised and applied the socialist theories of Lenin and Karl Marx as political expediencies used to realise his plans for the Soviet Union and for world socialism.The book "Concerning Questions of Leninism" (1926) represented Marxism–Leninism as a separate communist ideology and featured a global hierarchy of communist parties and revolutionary vanguard parties in each country of the world.With that, Stalin's application of Marxism–Leninism to the situation of the Soviet Union became Stalinism, the official state ideology until his death in 1953.