No I do not think this is true. It can’t be. God made just one man, and just one woman. Just two human beings? Then how did the world diversify so much?? This is a lot of diversification. Take looks now. You can tell by the look of an individual which geography does he walk. But how did it all start. If climatic conditions only could make such difference, why would all multiple generation Afro-Americans in United States and all the multi-generations Asians too, not look like their American friends. I think God sneaked in some more individuals of different kinds when no one was looking.