The latter-day outcome of this evolution of an archaic institution, the wife, who was at the outset the drudge and chattel of the man... has become the ceremonial consumer of goods which he produces. But she still quite unmistakably remains his chattel in theory; for the habitual rendering of vicarious leisure and consumption is the abiding mark of the unfree servant.

However widely, or equally, or "fairly", it may be distributed, no general increase of the community's wealth can make any approach to satiating this need, the ground of which is the desire of every one to excel every one else in the accumulation of goods.

Any evolutionary science... is a close-knit body of theory. It is a theory of a process, of an unfolding sequence... of cumulative causation. The great deserts of the evolutionist leaders... lie... in their having shown how this colorless impersonal sequence of cause and effect can be made use of for theory proper, by virtue of its cumulative character.