3 ms·

It’s been 5,000 years since the dawn of agriculture. If multiple births were fertility increasing they’d be, if not normal, at least common in some groups. You

It’s been 5,000 years since the dawn of agriculture. If multiple births were fertility increasing they’d be, if not normal, at least common in some groups. You don’t even get 1 in 3. Single births are clearly not being found wanting by the Blind Idiot God.

bin0 7y ago
Not necessarily. Mortality of mothers is higher in multiple births; maybe that's a counter-pressure (fewer children). Children do worse as well ([0], [1], [2]). Ladies are not built to carry more than one child, especially considering the size of our children, and agriculture has been such a blip on the evolutionary/anthropological timescale that we have not had time to evolve so significantly as to change our basic reproduction. [0]: https://watermark.silverchair.com/151663.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAAkMwggI_BgkqhkiG9w0BBwagggIwMIICLAIBADCCAiUGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMNDbyu9VK0lVH1VRPAgEQgIIB9nVdpx5WY2VFTM3siR6zUpI0NIrJ8G9sLgHflEENvKJn66C3kpwvmovR88zIGT4Zf1EjM37ovBkwyBefyQUyxX2tV9MlM9OHvTxWrEG41Otg_iehqYE75eFXqRmaREkeDxT_ISS78RZiRXb-i6WkAIIleISQsmOwkTX_aGVOTOkFKNtHYQXN69Db-DMkH_Qh_wtjf6TLPgDfnShgZ8_YwcfGThvT1EwSpazZAHxh82Bfn8zKsfuwaEsObTJsVAuYACQcigL0RYheX7RHBn42fW2eq6IdG6702SQWhlpEfeTuez0kPQ-r-Jh44nomPMhRLMZMtXrtYVkXfDFCs3m1le7xk9YLjvNKZDdJ-LvJwtp9ouuvl1cQajuaSPN6VI5sD2SjGkd5NDs1CAaODx9hwmhKL-6S_WyMlktkw9keaDWvnIRyjLjiTO1AOHs_eURKqxutChnO9xeQYOwKjgJBrT5vt9hMPao9Weab89ykbOwiApEo4NGBAxHY4PGdgm8K_1O8N18g_De-fFCTeY7gMp0OYbWDAxEMRLrKNdTl1ON9sAU488gm7D6FHCQ71yPmc5ucl_aVoTm4sb85QLxJykbamXeBKCIr40bB_0M59bG37P1swc6dWvojGic6c5Vqr9HwB-ItUGp8afq2_zBBOMBTV7Ih4FU https://watermark.silverchair.com/151663.pdf?token=AQECAHi20... [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5541191/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5541191/ [2] https://bmjopen.bmj.com/content/4/4/e004514 https://bmjopen.bmj.com/content/4/4/e004514

bin0 7y ago

Not necessarily. Mortality of mothers is higher in multiple births; maybe that's a counter-pressure (fewer children). Children do worse as well ([0], [1], [2]). Ladies are not built to carry more than one child, especially considering the size of our children, and agriculture has been such a blip on the evolutionary/anthropological timescale that we have not had time to evolve so significantly as to change our basic reproduction. [0]: https://watermark.silverchair.com/151663.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAAkMwggI_BgkqhkiG9w0BBwagggIwMIICLAIBADCCAiUGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMNDbyu9VK0lVH1VRPAgEQgIIB9nVdpx5WY2VFTM3siR6zUpI0NIrJ8G9sLgHflEENvKJn66C3kpwvmovR88zIGT4Zf1EjM37ovBkwyBefyQUyxX2tV9MlM9OHvTxWrEG41Otg_iehqYE75eFXqRmaREkeDxT_ISS78RZiRXb-i6WkAIIleISQsmOwkTX_aGVOTOkFKNtHYQXN69Db-DMkH_Qh_wtjf6TLPgDfnShgZ8_YwcfGThvT1EwSpazZAHxh82Bfn8zKsfuwaEsObTJsVAuYACQcigL0RYheX7RHBn42fW2eq6IdG6702SQWhlpEfeTuez0kPQ-r-Jh44nomPMhRLMZMtXrtYVkXfDFCs3m1le7xk9YLjvNKZDdJ-LvJwtp9ouuvl1cQajuaSPN6VI5sD2SjGkd5NDs1CAaODx9hwmhKL-6S_WyMlktkw9keaDWvnIRyjLjiTO1AOHs_eURKqxutChnO9xeQYOwKjgJBrT5vt9hMPao9Weab89ykbOwiApEo4NGBAxHY4PGdgm8K_1O8N18g_De-fFCTeY7gMp0OYbWDAxEMRLrKNdTl1ON9sAU488gm7D6FHCQ71yPmc5ucl_aVoTm4sb85QLxJykbamXeBKCIr40bB_0M59bG37P1swc6dWvojGic6c5Vqr9HwB-ItUGp8afq2_zBBOMBTV7Ih4FU https://watermark.silverchair.com/151663.pdf?token=AQECAHi20... [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5541191/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5541191/ [2] https://bmjopen.bmj.com/content/4/4/e004514 https://bmjopen.bmj.com/content/4/4/e004514