[Tolik]

Lenin and his followers came up with the "Scientific Communism" to distinguish it from what they saw as naive Utopian Socialism of 17th-19th centuries. They were claiming that socialism and then communism are natural steps in human development, more just and better economically than preceding capitalism and feudalism. They are proved wrong, because their system needs to be forced on people to survive. It is not self-organizing and self-correcting as capitalism, which is indeed more "natural" if we can say so.

[Taliesan]

Self-organizing.

If you put a dozen people on a desert island, and the only rule is you can't hurt anybody else or force anybody else to do anything, you get a capitalistic society.

Pretty simple.