Index Entry
Man "has developed a very large use of what I call the extensions of life, the industrial development of tools that make tools, that make other tools. The spider makes a web and that is a tool. And the bird makes his nest which is a tool. We find that all life carries on some kind of external environment altering operation which when importantly persistent and specific become multifold alterations, one or more of which we identify as tools with which the living species effect much greater and repetitive alterations of other aspects of the environmental processes.
“For example, a man takes part of a tree and shapes it into an axe handle with which he chops down trees in order to concentrate lumber from those trees somewhat as to shed him from the rain. But man has developed this tool making capability to far greater degree than the other biological species.”
