Source: Europe and the People Without History, 1982, Chapter 9, Industrial Revolution, p. 267.
“Only when the stock of wealth can be related to human energy by purchasing living energy as "labor power", offered for sale by people who have no other means of using their labor to ensure their livelihood: and only when it can relate that labor power to purchased machines - embodiments of past transformation of nature by human energy expended in the past - only then does "wealth" become "capital."”
Source: Europe and the People Without History, 1982, Chapter 10, Crises and Differentiation in Capitalism, p. 298.
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Eric Wolf 24
American anthropologist 1923–1999Related quotes
Source: Europe and the People Without History, 1982, Chapter 12 The New Laborers, p. 354.

Introductory : The Problem
Progress and Poverty (1879)
Context: At the beginning of this marvelous era it was natural to expect, and it was expected, that labor-saving inventions would lighten the toil and improve the condition of the laborer; that the enormous increase in the power of producing wealth would make real poverty a thing of the past. … It is true that disappointment has followed disappointment, and that discovery upon discovery, and invention after invention, have neither lessened the toil of those who most need respite, nor brought plenty to the poor. But there have been so many things to which it seemed this failure could be laid, that up to our time the new faith has hardly weakened. We have better appreciated the difficulties to be overcome; but not the less trusted that the tendency of the times was to overcome them.
Now, however, we are coming into collision with facts which there can be no mistaking. From all parts of the civilized world come complaints of industrial depression; of labor condemned to involuntary idleness; of capital massed and wasting; of pecuniary distress among businessmen; of want and suffering and anxiety among the working classes. All the dull, deadening pain, all the keen, maddening anguish, that to great masses of men are involved in the words "hard times," afflict the world to-day. This state of things, common to communities differing so widely in situation, in political institutions, in fiscal and financial systems, in density of population and in social organization, can hardly be accounted for by local causes.

Confessions of a Revolutionary (1849)
Source: Europe and the People Without History, 1982, Chapter 3, Modes of Production, p. 78.

Source: 1860s, First State of the Union address (1861)
Context: Labor is prior to and independent of capital. Capital is only the fruit of labor, and could never have existed if labor had not first existed. Labor is the superior of capital, and deserves much the higher consideration. Capital has its rights, which are as worthy of protection as any other rights. Nor is it denied that there is, and probably always will be, a relation between labor and capital producing mutual benefits. The error is in assuming that the whole labor of community exists within that relation.

1920s, Whose Country Is This? (1921)

1960s, Operating Manual for Spaceship Earth (1963)