You were using three things interchangeably when they are not the same. I'm surprised Laika doesn't know the difference, but perhaps he learned the Soviet version of Marxism first.
I'm trying to stay out of this thread as I not sure much good will come of it; if by three things you mean atheism,marxism and marxism-leninism I'll give you a low-down.
> Marx based his materialism on the Atheism of Feuerbach who wrote
The Essence of Christianity and said man created god. Consequently, Marxism is atheist and represents a particular interpretation of materialist-atheism. There is a debate about breaks in continuity and when Marx became a "Marxist" and stopped being a "left hegelian". the latest this falls is in 1845 with
The German Ideology where Marx sets out the basic ideas for a "materialist conception of history". The "materialist conception of history" is atheist.
> Whilst Marx came up with the original ideas, they were worked out more systematically by later thinkers during the period of the Second International (1889-1916). There were differences between Marx and Engels views and it led to conflicting interpretations of Marxist thought. There was conflict over whether Marxism applied
only to Social Science or included Natural Science because Engels wrote
The Dialectics of Nature. Russian Marxism, essentially started with Plekanhov, took the view that Marxism was a "worldview" applying to both natural and social sciences. This view was inherited by Lenin, Stalin and Soviet Marxism.
The latter view, that marxism only applied to social science is the basis for Western Marxism, such as the Frankfurt School. This is the Marxism that still survives today and occassionally appears in sociology textbooks. It is
much less radical than it's russian counter-part which accepts "dialectical materialism" (the marxist philosophy of nature) in addition to "historical materialism" (marxist philosophy of society/history). Without dialectical materialism, the arguments for the necessity of class struggle and the class nature of the state are much weaker. So western marxism is compatable with capitalism and flexible/concilatory or "revisionist" as the soviets would call it.
> Marxism and Marxism-Leninism starts with
Stalin. Lenin considered himself a "marxist" and it wasn't until after his death (and it would have been much to his disgust) that people started using the term "Leninist". In the 1930's Stalin basically codified marxist ideology into a single, easy to learn, easy to repeat set of beliefs. certian varients of marxism that didn't fit in this orthodoxy were rejected. By the Third International (1919-1943) of communist parties, this varient of marxism spread through-out the world as "Marxism-Leninism". Maoism is an intellectual cousin and borrows the same philosophy ("dialectical materialism") despite having political differences in placing the emphasis of the revolution on the peasantry rather than the working class/proletariat.
However, the Marxist-Leninist ideology derived its cliam of authority to the "genuis" of Lenin as the founder of the russian bolsheviks and the leader of the October revolution in Russia. Lenin's works were re-interpreted over and over again as if it were a sacred text by sucessive parties, governments and leaders. sometimes it could be interpreted for democratic or totalitatrain ideas, but also can be debated over the scope of market and planned economies in a "socialist" system (socialism being the 'lower'stage of communism). Even now, the People's Republic of China will probably still be using some of Lenin's ideas on the New Economic Policy to justify their pro-market position in much the same way Gorbachev also appealed to lenin to justify pro-market reforms at the end of the Soviet era. The scope of debates that can take place in this frame work (and it's pretty big) is pretty much "Marxism-Leninism".
It doesn't mean that a communist or Marxist believes as Marx and Engels did, that the dialectic materialism "does not play dice". Especially we could take Lenin and the way he skips through necessary phases of development toward communism and destroys some "fundamentals" of Marx in the process.
Ironically, you're quoting Einstein's remark that "god doesn't play dice". This was also the Soviet view that nature was governed by natural laws and was determined (edit: minus the god part obviously
). Einstein made that remark regarding the indeterminism of quantum mechanics. The Soviets had serious headaches over quantum mechanics because of it's indeterminism as- they said- it attributed "free will" to the atom and gave scope to interpetations of physics that conflicted with dialectical materialism and party ideology.
Lenin (or Trotsky depending on your view) actually compressed the stages of revolution, meaning that it was the proletariat/working class who was going to perform the role of making a "bourgeois/capitalist" revolution because the bourgeoisie was too weak in Russia to do it on it's own. The Proletariat would of course not stop here and it was why Lenin argued for a "proletarian/socialist" revolution.
(On the subject of atheism, one notable exception to the communist/marxis-atheist rule is "Islamic Marxism" which developed central asia in the 1920's and has some intellectual influences on the current Islamist movement. they are sort like Islamic Leninists in some respects with their attitude towards political organisation and the state. religious varients of Marxism are
the exception because of dialectical materialism which is
inherently atheist).
To an outsider, Dialectical materialism is insane. But really, it is a systematic attempt to eliminate "god" from the account of the universe, along with anything suggesting that consciousness could be the cause of the universe including indeterminis, free will, etc. it earned Orwell's ridicule in 1984 as "doublethink" and not without justification because of how often it was abused. e.g. Stalin interpreted Engels statement that the state would "wither away" under Communism to include expanding it until it controlled everything and so the state and society became identical. in terms of dialectics it's brilliant, but politically, its absolutely terrifying.