When Did Supposed Races of Humanity Begin & Did They Differentiate Together or In Disparate Regions of the Earth?

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So-called Homo Erectus then Neanderthal Men of unknown skin color supposedly evolved into Homo Sapiens, so did that happen in Africa from where all humans ostensibly evolved or did the varying skin colors of humanity manifest long after “Homo Erectus” theoretically departed from Africa? The biblical model explains it all, that the “races” manifested of the families following the Tower of Babel, having moved far away, isolated gene pools in new ecological niches during the Ice Age which followed Noah’s Flood, some physical traits become dominant within the respective gene pools to manifest “the races.”