Well, that's not quite the essence of Marxism-Leninism (read the first w/u). Basically, Marx looked at the industrialization in Germany said that when the proletariat reached critical mass, they would spontaneously revolt, overthrow the bourgeoisie, and establish a worker's paradise. Enter Lenin. Lenin lives in Russia in the late 1800s. Russia at this time is still a primarily agricultural society. Lenin has a grudge against the Tsar, because the Tsar killed his brother. Lenin seizes on Marxism as the way to overthrow the Tsar, but realizes it needs a little embracing and extending before he can apply it to Russia. He creates Marxism-Leninism.

According to Marxism-Leninism, a primarily agricultural society can be rapidly converted to Marxism if a small elite of "professional revolutionaries" (read: Lenin and his buds) overthrow the ruling class via a "violent and bloody revolution."