And hath made of one blood all nations of men for to dwell on all the face of
the earth,
and hath determined the times before appointed, and the bounds of
their habitation;
Acts 17:26
"According to a study published Jan. 10 in Nature by geneticists from 4 universities including Harvard, “Analysis of 6,515 exomes reveals the recent origin of most human protein-coding variants.” By recent they mean really recent on evolutionary timescales:
We estimate that approximately 73% of all protein-coding SNVs [single-nucleotide variants] and approximately 86% of SNVs predicted to be deleterious arose in the past 5,000–10,000 years. The average age of deleterious SNVs varied significantly across molecular pathways, and disease genes contained a significantly higher proportion of recently arisen deleterious SNVs than other genes.
More generally, the recent dramatic increase in human population size, resulting in a deluge of rare functionally important variation, has important implications for understanding and predicting current and future patterns of human disease and evolution. For example, the increased mutational capacity of recent human populations has led to a larger burden of Mendelian disorders, increased the allelic and genetic heterogeneity of traits, and may have created a new repository of recently arisen advantageous alleles that adaptive evolution will act upon in subsequent generations.
As for advantageous mutations, they provided NO examples. That’s merely an assumption, based on neo-Darwinian theory, that evolution would need beneficial mutations as raw material for “adaptive evolution” in the future. What they observed, by contrast, was a “larger burden of Mendelian disorders” afflicting mankind." CEH