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    A somewhat different version of this paper was originally presented to the Section of Anthropology of The New York Academy of Sciences on December 16, 1974, in coauthorship with Dr. Janet Siskind of Rutgers University. Due to a friendly, but abiding, disagreement with certain positions that I hold with equal tenacity, Dr. Siskind has elected to remove her name from authorship of the published article. I share her misgivings that some of our conclusions were rather premature and speculative, and I offer the paper in the hope that its venturesome character will provoke further discussion. The text of the article was written by me, but many of the ideas in it derive from Dr. Siskind. She is in a very direct way responsible for much that is good in the essay, but she is in no way culpable for its errors and extravagances.