Beck 267: "[C]apitalism [...] is wholly dependent on growth. Its unique innovation was to mandate that the profits secured by any process of economic production--whether the harvest of a successful crop, the construction and sale of new housing, or the invention of a groundbreaking medical treatment--be invested back into the production process, thus enabling that process to expand."
this connects to the necessary movement of capital, detailed further on 270: "capital can't just sit around [...] because then its returns drop [...] essentially to zero. Something has to be done with it, because capital has to keep moving to survive. When a venture fund invests $1 million in a start-up, it is deploying capital; when an eccentric great-aunt hides $1 million in $100 bills under her flooboards, it's just cash"