The title of this collection properly belongs only to the first essay. On 3 December 19591 had the honour to deliver the first Malinowski Memorial Lecture at the London School of Economics. The Editorial Board of the London School of Economics Monographs in Social Anthropology generously offered to publish the text of my lecture but added the flattering suggestion that I should reprint a number of my other essays at the same time. I have accordingly appropriated the title of my Malinowski lecture for the whole collection.
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