Final answer:
According to Karl Marx, capitalism, feudalism, and communism are all examples of economic systems that evolve and conflict over time due to class struggles and control over the means of production, with communism being the eventual replacement for capitalism.
Step-by-step explanation:
According to the theories of Karl Marx, capitalism, feudalism, and communism are all examples of economic systems. Marx's analysis of history, known as historical materialism, suggests that societal development occurs through the conflict between social classes over control of the means of production. Capitalism, characterized by private property and corporate ownership, would eventually lead to its own demise due to its inherent inequalities, sparking a revolution that results in a transition to communism — an economic system where there is communal ownership and distribution of resources.