Two hypotheses concerning the influence of natural selection intensity on intra- and interpopulational variability of metric characteristics of the human skull ar tested. Using data on 58 series from Europe and its environs dating from Neolithic to modern times, it has been found that with the decline of the decline of the intensity of operation of natural selection (1) intragroup variability increases, (2) intergroup variability decreases, and (3) there is a trend toward shorter, wider, and lower braincase and shorter upper face.
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