To leave an immense part of the history of the human mind a blank runs the risk of encouraging the idea that during all those millennia the activity of the mind was confined to the preservation and transmission of technology. Such an opinion is not only erroneous, it is fatal to a knowledge of man. Homo faber was at the same time Homo ludens, sapiens, and religiosus. Since we cannot reconstruct his religious beliefs and practices, we must at least point out certain analogies that can illuminate them, if only indirectly.
