Perpetual revolutions in technology can mean the devaluation of fixed capital on an extensive scale. - David Harvey

Not only must weapons be bought and paid for out of surpluses of capital and labour, but they must also be put to use. For this is the only means that capitalism has at its disposal to achieve the level of devaluation now required. The idea is dreadful in its implications. What better reason could there be to declare that it is time for capitalism to be gone, to give way to some saner mode of production?

But the net effect of increasing scale, centralization of capital, vertical integration and diversification within the corporate form of enterprise has been to replace the 'invisible hand' of the market by the 'visible hand' of the managers.

The invocation of social necessity should alert us. It contains the seeds for Marx's critique of political economy as well as for his dissection of capitalism.