“Our Sages of the Talmud explain why the creation of Man differed from the creation of all other living species and why, among other things, man was created as a single individual, unlike other living creatures created in pairs. One of the reasons – our Sages declare – is that it was G-d’s design that the human race, all humans everywhere and at all times, should know that each and all descend from the one and the same single progenitor, a fully developed human being created in the image of G-d, so that no human being could claim superior ancestral origin; hence would also find it easier to cultivate a real feeling of kinship in all inter-human relationships.”
The Lubavitcher Rebbe (excerpt from a personal letter)