Asians peoples are mostly under 5 feet tall.

I saw a document that claimed the Asians were slaves and any Asian Slave that was taller then the marked height was killed. Makes them people mostly physically harmless, like little kids, but good in home slaves to cook and clean.

Also seems the South American population that was breed with African 4000 BC, was subject to the same height restrictions.

Egyptians have a rich history of breeding animals, like cats and dogs, I be sure it expanded to human traits also.

Like in the bible, they talk about giants, A king thought the bigger the human the better a warrior.