Value-form
The Western Left academics are nowadays very happy to talk about "varieties of capitalism", but talking about "varieties of socialism" remains almost an absolute "no-no". Most Marxists continue to believe in "only one" (Marxian) socialism: either that, or nothing at all. "Either" a society or movement conforms to the true concept of socialism, "or" it does not; and if it does not, it "cannot be" socialism. However, precisely "because" there are many different Marxist beliefs about socialism, Marxists cannot agree among themselves whether Soviet-type societies were socialist, capitalist, or something else. Some countries meet with the moral expectations which Marxists have, and others do not.Originally Marx and Engels themselves had heckled the advocates of "true socialism", but later Friedrich Engels and Karl Kautsky promoted Marxist socialism as the one and true "scientific socialism" within the Socialist International. When he was 43 years old, Lenin stated: "The Marxist doctrine is omnipotent because it is true". Lenin's Communist International (a deliberate split with the social democrats) adopted Marxist socialism as its official political doctrine.
Communism
Christian communism can be seen as a radical form of Christian socialism. Christian communists may or may not agree with various aspects of Marxism. They do not agree with the atheist and antireligious views held by secular Marxists, but they do agree with many of the economic and existential aspects of Marxist theory, such as the idea that capitalism exploits the working class by extracting surplus value from the workers in the form of profits and the idea that wage labor is a tool of human alienation that promotes arbitrary and unjust authority. Like Marxism, Christian communism also holds the view that capitalism encourages the negative aspects of humans, supplanting values such as mercy, kindness, justice and compassion in favor of greed, selfishness and blind ambition.