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Paul Erhlich, the author of the book "The Population Bomb", a work with a fearmongering Malthusian tone which warned of the catastrophic effects of overpopulation, has also claimed that the size of the modern human jawbone is much smaller than it was pre-modernization.
Paul Erhlich, the author of the book "The Population Bomb", a work with a fearmongering Malthusian tone which warned of the catastrophic effects of overpopulation, has also claimed that the size of the modern human jawbone is much smaller than it was pre-modernization.
Like Mike Mew, he mainly blames environmental factors like mouth-breathing, modern food processing techniques making food require less effort to chew, though Erhlich also attributes some of this claimed decrease in jaw size to environmental pollution with toxic chemicals that disrupt the regular development of the jaw.<ref>https://news.stanford.edu/2018/04/10/paul-ehrlich-problems-modern-jaw/</ref>
Like Mike Mew, he mainly blames environmental factors like mouth-breathing, and modern food processing techniques making food require less effort to chew, though Erhlich also attributes some of this claimed decrease in jaw size to environmental pollution with toxic chemicals that disrupt the regular development of the jaw.<ref>https://news.stanford.edu/2018/04/10/paul-ehrlich-problems-modern-jaw/</ref>
Some of this decrease may also be due to increasing mutational load or selection pressure against larger jaws, though it seems these factors are insufficient to explain most malocclusions, or the secular decrease in jaw size, given the low frequency of the affected gene variants and the apparent rapid pace of this change in jaw size.<ref>https://academic.oup.com/bioscience/article/70/9/759/5872832</ref>
Some of this decrease may also be due to increasing mutational load or selection pressure against larger jaws, though it seems these factors are insufficient to explain most malocclusions, or the secular decrease in jaw size, given the low frequency of the affected gene variants and the apparent rapid pace of this change in jaw size.<ref>https://academic.oup.com/bioscience/article/70/9/759/5872832</ref>


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