. . . evolving from Homo species to Homo species to modern humans took place in large polygenesis source populations. A large random breeding evolving population is not the same as the Catholic doctrine that the human species was founded by a population of two, Adam and Eve. The Homo/Pan split is a speciation event and not the original human population of Adam and Eve. . .
You make the point quite clearly.
As populations mix, we get greater diversity and as they become more isolated, differences will appear and we end up with so-called races, which is an illusion; there are no human sub-species.
I wanted to follow-up on a point you make.
It is that except in the case of very primitive life forms with rudimentary instinctual behaviour, breeding can hardly be said to be random.
The experiential make-up of any creature allows for its participation within the environment from which it emerges.
There are differences in social behaviour, showing great variation in complexity, but as a general principle, instinctively animals are drawn to the beautiful.
That is why in the darkness, where vision plays almost no role in their relationship with the world and each other, there are some pretty weird-looking creatures.
What may be beautiful to an animal is not necessarily the good for us, such as with promiscuity and female coercion as means of reproduction.
We have built-in ways of perceiving, feeling about and behaving that are shared with our fellow creatures on earth.
This is the psychologically equivalent of our sharing anatomical features such as a nervous system, heart and lungs, liver, bones and muscles and so on.
With respect to the soul/mind, the possession of free-will changes everything, reducing instincts to a secondary position and making love the primary drive.
Whether it is love of family or a particular individual or in the best case scenario, both, marriage boils down to choices - in courtship, on our wedding day and during the course of our marriage, with its joys and challenges. Our brokenness makes the pursuit of what gives true fulfillment and happiness very difficult. It is impossible actually without God, who is love and of whom marriage is a symbol, the human expression His Triune nature.