The principle of endless accumulation that defines capitalism is synonymous with exponential growth, and the latter, like cancer, leads to death. John Stuart Mill, who recognized this, imagined that a "stationary state of affairs" would put an end to this irrational process. John Maynard Keynes shared this optimism of Reason. But neither was equipped to understand how the necessary overcoming of capitalism could prevail. By contrast, Marx, by giving proper importance to the emerging class struggle, could imagine the reversal of power of the capitalist class, concentrated today in the hands of the ruling oligarchy.
This article can also be found at the Monthly Review website, where most recent articles are published in full.