But Phil, is your concept of “being human” a biological definition, a biblical one, or something else? We’ll discount those who exclude those present people lacking cognitive abilities, though medical ethics has a lot to do with that, and we’ll ignore those biologists and anthropologists who argued, on scientific grounds (eg Haeckel), that the “races” were species and that there was a greater gulf between an aborigine and a European than between a man and an ape. Science was wrong on that, and has moved on.
But although we are all Homo sapiens now, that is a taxonomic classification that doesn’t tell us what “human” means. Josh’s work discusses this in detail (as does mine). Since the biblical foundation for the anthropology of our race is Adam, the biblical definition of “human” is “descended from Adam,” rather than vice versa.