[Frumious Bandersnatch]

Not so. While the capitalist system is a good argument for micro-evolution (changes within the system), the communists believe that the capitalist system will be replaced by communism (changes without the system - social darwinism so to speak).

[Doctor Stochastic]

Of course the capitalist system doesn't have a designer (aka Central Committee) but the communist system does. Capitalism forms random structures (vide Adam Smith) as opposed to the carefully planned (every 5 years!) communist system.