Concept:
Karl Marx argued that capitalism contains internal contradictions that eventually lead to its own collapse.
According to Marx:
• Capitalism creates exploitation of labour.
• Wealth becomes concentrated in the hands of capitalists.
• Economic crises occur repeatedly.
• Class conflict between the bourgeoisie and proletariat intensifies.
These contradictions constitute the "seeds of destruction" of capitalism.
Step 1: Examine the options.
• [(A)] Aristotle discussed ethics and politics, not capitalism.
• [(B)] Karl Marx believed capitalism would ultimately collapse because of its internal contradictions. Correct.
• [(C)] Robert Solow is known for the Neoclassical Growth Model.
• [(D)] J.S. Mill supported liberal economic ideas but did not propose this theory.
Hence,
\[
\boxed{\text{Correct Answer}=(B)\;\text{Karl Marx}}
\]