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Study: IQ decline caused by immigration, miscegenation, and potentially dysgenics contributed to the collapse of Roman Empire. <a target="_blank" href="https://openpsych.net/paper/73/" color="blue">openpsych.net/paper/73/</a> Averages of Imperial era samples from Rome and Etruria are half Middle Eastern: <a target="_blank" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7093155/" color="blue">ncbi.nlm.nih.gov/pmc/articles/P…</a> <a target="_blank" href="https://www.science.org/doi/10.1126/sciadv.abi7673" color="blue">science.org/doi/10.1126/sc…</a>
The combined averages of all non-outlier samples are highlighted in yellow here. Recent European, Middle Eastern, or North African migrants (marked _o) were excluded from these averages. Most migrants probably came from Anatolia, Greece, North Levant. <a target="_blank" href="https://twitter.com/thltd_/status/1694133861310222823" color="blue">x.com/thltd_/status/…</a>
