The core dynamic of the capitalist system is the accumulation process, a process in which a portion of the profits reaped through the sale of goods and services is reinvested, swelling the capital stock, incorporating new technologies in the process, and permitting larger sales and profits in the future.

VICTOR D. LIPPIT, Capitalism

Capitalism continually renews and reinvents itself. This helps us to understand the fact that despite its severe internal contradictions, contradictions that Marx anticipated would bring about the ultimate collapse of capitalism, the capitalist system has managed to remain vibrant over the centuries.