>> which I think requires a new narrative and philosophy for what human equality means and a way to ground it on something more fundamental than a wished-for genetic similarity.
I'm sorry but that sounds mighty dangerous. Human equality was never grounded in genetic similarity; you do not need to know that your salad mix of ancestors are different to others to understand that every human today deserves equality. Sure groups of people may be different - like culture - but once we start thinking that one is better than the other, we get hierarchy, and we get superiority. It's not as if it doesn't exist today at varying degrees but careful that it doesn't gain mass momentum. It's a slippery slope and one we've gone down far too often.