Final answer:
According to Karl Marx, capitalism was a necessary evil as it created the conditions for workers to unite as a revolutionary class. Marx's idea that wealth becomes highly concentrated among a few is accurate in today's society.
Step-by-step explanation:
Karl Marx believed that capitalism was a necessary evil because it created the conditions for workers to come together as a revolutionary class. He argued that capitalism would eventually lead to the collapse of the system and the reclamation of control by the working class. However, Marx underestimated the difficulties of creating a classless society and the temporary centralization of government power that communism required. In today's society, we can concede that Marx's idea of wealth becoming highly concentrated among a few is accurate.