Page:The Theory of the Leisure Class.pdf/33

 this growth being due to a change in the circumstances of the group’s life, of such a kind as to develop and conserve those traits of human nature and those traditions and norms of conduct that make for a predatory rather than a peaceable life.

The evidence for the hypothesis that there has been such a peaceable stage of primitive culture is in great part drawn from psychology rather than from ethnology, and cannot be detailed here. It will be recited in part in a later chapter, in discussing the survival of archaic traits of human nature under the modern culture.