Note 1015 — Chapter III · : MARXISM

“The surplus-value theory may be true or it may be false, but that will make no difference to the existence of surplus labour. Surplus labour is a fact of experience, demonstrable by observation, and requires no deductive proof.” (Bernstein, loc. cit., p. 42.) That Marx did not treat it with quite the same indifference is evident from the fact that the whole theory is developed, not incidentally in the course of the work, but at the very opening of the book.