In Capital in the Twenty-First Century, the French economist Thomas Piketty integrated years of income data to derive a general law of accumulation: the rate of return on capital tends to exceed the rate of economic growth. This tendency, summarized as r > g, is a dynamic that produces ever-more-extreme income divergence and with it a range of antidemocratic social consequences long predicted as harbingers of an eventual crisis of capitalism.

Shoshana Zuboff, The Age of Surveillance Cap…, loc. 135